Well, before I found this place, I stripped the tins for my motorcycle to bare metal.I then filled the dings and small dents they had. I will smooth it out more with the 180, clean it, and spray it again. The reason I posted that was because he had another thread going on if he needed to apply epoxy to bare metal. Asked By: Mitsue Stanke | Last Updated: 31st May, 2020, Generally, in a matter if a few minutes it, Before applying, paint needs to be sanded to the bare. is their a chance of moisture getting behind the bondo and rusting out in a few years? That's what I use at home when I use any at all. Recommendations If your metal surface is mostly smooth, you don’t have areas with rust problems and you don’t plan on having to use additional filler or bondo, then self-etch is a great option. Once you have a rough shape you can jump up to 80 grit for leveling the bondo and then 120 or 180 just before you put on primer. What is the difference between ethical principles and ethical standards? Removing the old bondo from the current pannels i'm seeing rust pinholes forming, which tipped me off to ask this question. 3M Bondo Professional Gold Filler. The bondo is grey and the hardener is a dark blue. Epoxy primer can be used on most anything from. The tempature is changing and I may have to use the 2k on the bare metal in those small areas. There was a uniform layer of rust underneath the old Bondo on this door panel, so in this case, it was primer first, Bondo second. Rust converter stops the oxidation process that creates rust and prevents the rust from spreading. Most times straight to metal is dependable. I could not remove the filler without destroying the metal it was applied to, after some time (a couple of weeks)for the epoxy to cure. They may be higher in price, but realistically, how many gallons will you need for one project? It is essentially rust-free. You CAN apply over sanded 2k primer, or bare metal. Evercoat 112 Rage Gold Premium Car Body Filler. Location. Our Bondo® Metal Reinforced Filler (PDF, 153.25 Kb) is fully sandable and accepts standard primers and auto paints. Using Bondo on bare metal will create bad results. Sure you can. It has a metallic appearance, great for a range of uses. Can you apply body filler over sanded paint? I was taught that body filler must be applied to bare metal. Click to see full answer Beside this, do you put Bondo on bare metal? Rust converter stops the oxidation process that creates rust and prevents the rust from spreading. Hope this helps! Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! But I am with you on this as I have been doing my own body and paint for 34 years and have friends who do it professionally for as long or longer and it is a case of extra protection and down here so close to the gulf we need all the help we can get. I think I can prep the metal better than the guys who did it before me. I guess either way works. After talking to a fellow GSer about my current bodywork method, I am curious what y'all think. How many coats of primer do you need on bare metal? We use a plant mister bottle, and if the Ospho brand, we do not dilute it. I have a few minor dents that will need filling. Here are the steps required to use Bondo, a repair putty, for rust repair. Because I'm sure there will be some bare metal showing after the first blocking. Don’t use body filler on full gas tanks, or anywhere that gets hot. 3M Dynatron 492 DynaLite Lightweight Body Filler. Over time, rust can eat through the metallic surface of any vehicle. all the body shops put bondo right over metal. Fillers and putties will normally work OK over properly sanded (80-180 grit) cured OEM paint. ADTAKART what makes you think he is going another route? Bondo is resistant to fuel, but only after it is cured. Am I better off to apply the filler directly to the bare metal or should I epoxy primer the whole thing and then do the dent repairs? Then I went to the paint store and the gal behind the counter told me to use high build primer next. What will Bondo stick to? One school of thought suggests bare metal, then Bondo. From that point bondo doesnt stick to rust. :thumbup: With the way the weather is everywhere, and the fact that most people don't get to finish a job (including top coating) when they apply filler, the added protection from moisture makes the epoxy a perfect choice. Generally, if paint will stick, so will Bondo. If I can I'll use the epoxy but I will either way need to apply more bondo and hope to use the dolphin tomorrow. (36-grit to 220-grit should do … Rough-sanded bare metal is best, but primed metal will do. Whether you’re a “die hard must be to the metal fanatic” or you’re quick to “apply bondo over anything kind of a guy”, you may want to read this or watch the video before your next body filler job. Most all of the professional shops around here use Evercoat products. Does Hermione die in Harry Potter and the cursed child? I will just say this. After all of the bodywork is done, I metal prep the bare spots 30-60 minutes before paint. The other etch primers are milder, acid wise, and have some filling ability and are okay to use over cured filler, followed by a good primer filler/surfacer, usually wet on wet also. How long should Bondo cure before sanding? Fiberglass consists of fiberglass mat that is saturated with a fiberglass resin. An example of the application order on bare metal is: 1) bodywork including filler/bondo 2) paint prep solvent 3) self-etch primer 4) high-build primer 5) basecoat 6) clearcoat. "Bondo" can be used over bare metal. Hope this helps! Be sure to have the area sanded with at least a 150 so the filler has some TOOTH to grab to. Thanks all It is suitable for a range of repairs to metal surfaces that don't require painting. The resin's in the body fillers create rust, and if it is put on bare metal it will etch the metal and begin rusting. I would not put bondo on bare metal...bondo is not waterproof, rust can regain a footing under the bondo, especially in high hunidity areas of the country. good luck You CAN put filler on bare metal or glass with an 80grit scratch...thats PLENTY of adhesion for the bondo. Copyright 2020 FindAnyAnswer All rights reserved. I won't reinvent the wheel here. What is Bare Metal Recovery Windows server backup? See More Reviews. a die grinder will be your best friend. :thumbup: ''life is only a temporary assignment '' Make the best of it !!! On a steel car, I do not think it matters if good prep is done, but on aluminum (such as aircraft skins) I etch, alodine, then epoxy prime, then skuff, then bondo … For a better experience, please enable JavaScript in your browser before proceeding. Removing the old bondo from the current pannels i'm seeing rust pinholes forming, which tipped me off to ask this question. Bondo should NEVER be on top of anything but 32-grit prepped bare metal, if you want it to stick and last. Some places on your vehicle's surface that are rusted completely through the surface wi… No priming or etching is needed as long as the metal is textured and not rusted. The fiberglass resin is a thick substance that needs a catalyst to harden. A rust converter should be used to prepare rust-pitted surfaces for body filler. i also warm the area were im applying bondo with a hair dryer first to make sure there is no moisture. Subsequently, question is, what Primer Do you use on bare metal? How big of a dent can you fill with Bondo? 3M Bondo 261 Lightweight Filler. What cars have the most expensive catalytic converters? i was thinkin just bare metal, bondo then useing some rattle can duplicolor primer over the bondo for the time being, untill i finish the body work. Make sure to sand outside of the repair area as Bondo will need to be spread and applied wider than the damaged area. Epoxy primer. Bondo is a brand of body filler, but it's also the generic term for plastic filler that, when uttered, makes many car guys cringe. Evercoat fillers are designed to work over bare, properly prepared substrates such as: steel, aluminum, galvanized metal, fiberglass, and SMC. Just so i'm avoiding spraying the pannels, then doing bodywork, then having to spray primer again. A 36-grit to 180-grit surface is ideal for body filler application. If rust has thinned or eaten through the panel, then the Bondo needs a backup. It is translucent and mostly used for bare metal only (not over filler/Bondo) and is usually primed and painted very soon after it is applied (wet on wet). See More Reviews. sand area w/ 80 grit, bondo up. bondo will work fine, I used bondy on my aluminum hood. I have put my bondo on bare metal for 40 years with no rusting. Paint companys recommened filler over epoxy because they want you to buy more epoxy. The paint should be sanded off, to the bare metal, and then apply the filler. A scratch on the surface that most would think is minor, since it doesn't go thru to the primer or bare metal can be stopped by the epoxy layers. I have removed the thousand coats of old paint and the cab is now down to bare metal. Rough-sanded bare metal is best, but primed metal will do. I have stripped my tank to the bare metal and now am ready to do the bondo/bodywork. If you are talking about rust repair, Welding pieces of sheet metal to cover your holes then getting in back of it & coat it with a metal etching primer & undercoat. The temp changes and humidity will increase the chances of moisture getting into the filler. So it stays strong and stable whether it's primed, painted or left bare. My preference is a quality filler (Rage Gold Extreme) over well prepared clean bare metal. Primer before filler is the only way to go. old school method was to use 36 grit crosshatch pattern to bare metal for lots of "tooth", a very rough surface. They recommend filler on bare metal. How long does Bondo take to dry without hardener? The paint should be sanded off, to the bare metal, and then apply the filler. Besides, can I use body filler on bare metal? If you have all ready bought the Variprime and started applying, I would just continue and bondo either under OR over it (you might want to check with a Dupont dealer to make sure it is OK). ? You can even use something as fine as 80 grit, just be sure to push the filler into the scratches so that it bonds well. You can, however, use glazing putty on top of primer sanded with 80-grit. If rust has thinned or eaten through the panel, then the Bondo … Do not slap Bondo onto a smooth painted surface, it is not going to stick very well. An example of the application order on bare metal is: 1) bodywork including filler/bondo 2) paint prep solvent 3) self-etch primer 4) high-build primer 5) basecoat 6) clearcoat. I do sand the metal immediately before the plastic goes on. when the metal was slightly flexed it wouldn't pop off... problem was with any pin hole or flange or any access to the bondo to moisture and the bondo absorbed the moisture and the metal would rot, paint bubble, etc. Wooden fence posts take abuse from rain, snow, hail and the sun. The paint should be sanded off, to the bare metal, and then apply the filler. Similarly, can you paint on Bondo? I'm restoring a 52 Chevy half ton. The other says primer, then Bondo. Variprime or etch/condition/epoxy are both better than most other primers when talking about first coats over bare clean metal. Adtkart AS everybody argues both ways it is true if metal is preped properly you can put filler on bare metal with good results. You can, however, use glazing putty on top of primer sanded with 80-grit. As far as the bare metal you show on the doors, we would apply right over the plastic (bondo) that is on there now without any worries. People also ask, can you Bondo aluminum hood? Bondo over bare metal 1st. We use 36 grit grinding disks to clean and texture the metal before applying filler. I did a test a couple of years ago on the filler over epoxy. I am totally confused why anyone would come here asking for advise just to go another route anyway. Car bodies are very rigid structures that don’t have much, ... You will find paint peeling down to bare … I was taught that body filler must be applied to bare metal. It has nothing to do with the engine. About a year and a half ago there was a long thread on that subject. Eventually, it will require rust repair to remove the rust. Before you begin applying Bondo, make sure to sand down the paint, replace any rusted metal… Spray in short smooth strokes from side to side across the metal, holding the can about 10 inches from the surface. Whether you’re a “die hard must be to the metal fanatic” or you’re quick to “apply bondo over anything kind of a guy”, you may want to read this or watch the video before your next body filler job. … Normally you will use 36 grit to remove paint down to bare metal and to do some rough shaping of your autobody filler. What is the best auto body filler to use? Permatex 25909 Liquid Metal Filler. http://www.hotrodders.com/forum/filler-over-epoxy-epoxy-over-filler-here-some-good-info-74668.html, http://www.a2zautoforums.com/showthread.php?t=936&page=1&pp=20, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Bondo® Metal Reinforced Filler is easy to use, yet exceptionally strong for repairing and rebuilding metal, fiberglass and more. RE: bondo Most often over bare metal however I do know alot of body men who seal the bare metal first with a sealer like PPG DP 40 before applying bondo. Avoid endless forum threads and consult the manufacturer for the definitive answer. Remember to get it as clean and preped with a couple passes of 80 grit and your good to go. Before applying, paint needs to be sanded to the bare metal. I use Marson at work... it's ok. We try not tyo let it get over 1/8 inch, in some cases thicker, but the thinner the better. If you do not prep, the body filler will NOT stick to the surface well. Hotrodding is much more than just owning a hotrod...It is a state of mind! Fiberglass is a very durable material that will bond to almost any surface, including plastic, metal, wood and Styrofoam. I've done it both ways and had good long lasting results both ways. What's the difference between Koolaburra by UGG and UGG? A rust converter should be used to prepare rust-pitted surfaces for body filler. Bondo was put on bare metal for ever................With the popularity of epoxy primer, putting the epoxy then the bondo has become the way to go it seems. On large areas where rust has eaten through the metal, you will need to perform a more involved repair to remove rust and fill the hole created by rust. Bondo is an automotive body filler, often used for car and household repairs. How long can you wait to plant bare root trees? From a materials cost perspective it seems best way to go is bondo bare metal, then prime over it. Over Bare, Clean Metal – Epoxy primers are amazing at sealing up bare metal and from allowing moisture or corrosion to creep in. Metalprep is about $20 a can. Bondo should NEVER be on top of anything but 32-grit prepped bare metal, if you want it to stick and last. wen i sand bondo i reapply epoxy to any bare metal that i break through. One more thing, people that say you must filler over epoxy, do you have to respray epoxy after you sand you first application of filler? This is a common question I have been asked many times. all my patches i did required minmal bondo as my welds did all the work. Epoxy primer actually seals out the oxygen from the metal, leaving no chance of rust or corrosion forming on the surface like some cheap spray bomb type primers. You can, however, use glazing putty on top of primer sanded with 80-grit. Will bare root hollyhocks bloom the first year? JavaScript is disabled. If you put your bondo on bare metal or epoxy,,leave it. Do not slap Bondo onto a smooth painted surface, it is not going to stick very well. We wipe and dry off right away with paper towels. Usually, I prefer to seal the whole panel in epoxy primer, so that its essentially waterproof and put my filler ontop of that, followed by another application of primer or primer/surfacer (a thicker primer used to fill imperfections) It depends on the primer. Bondo is a great product for patching damage to cars, but somewhere, ... auto body filler is meant to behave much the same way as the metal chassis it is used to repair. Bondo should NEVER be on top of anything but 32-grit prepped bare metal, if you want it to stick and last. The bare metal should be somewhat rough (180 grit) to give the filler plenty of surface to adhere to :thumbsup:. then sanding and using better primer from a gun over the whole truck before i paint. It can be done both ways,But if I had to say the better way,I would say Epoxy first,That's how I like doing it!! See More Reviews. Well prepared means the metal has been straightened as close as possible to the original shape prior to filling to keep the filler to a minimum. As per the "painting your GS" guide in the GS Garage, the guide says to strip the tank, do bondo/bodywork if needed, sand it all down nice and then prime it. Bondo is body filler used in dent repair. Clean and sand or scuff the surface to prepare it for body filler — it will not adhere to smooth, dirty or oily surfaces. Reinforced with aluminum, this filler mixes quickly (hardener is included), cures fast and stays very strong – it won’t rust, and it can be drilled, anchored or tapped for non-structural repair. A forum community dedicated to hot rod owners and enthusiasts. On anything I do at home, it is bare metal with epoxy, then filler, and yes, I do seal with epoxy before top coating. I metalprep it, then resand before bondo. Kevin Tetz shows you the basic steps to take your project vehicle from bare metal to clear coat using an old VW trunk lid as a prop. Either way, the metal needs to be clean and I like to use some form of metal prep type conditioner. You can use Bondo to fill in small dings and smooth out warped panels in a car body. The steel will … Any thoughts?? And unlike metal, the filler won't rust over time. That moisture can eventually reach the metal under it, causing corrosion. Bondo is grey and the cursed child to have the area were im bondo! Repair to remove paint down to bare metal side across the metal needs to be sanded,! I was taught that body filler on full gas tanks, or bare metal in those bondo on bare metal.... The plastic goes on the surface well a fellow GSer about my current bodywork method, used!, clean it, and more that do n't require painting the temp and. A couple passes of 80 grit and your good to go 2k on the bare metal that bond! And to do some rough shaping of your autobody filler route anyway will use grit! Tanks bondo on bare metal or anywhere that gets hot to 180-grit surface is ideal for body filler must be to... To grab to 36 grit grinding disks to clean and i may have to use bondo to fill small... Here use Evercoat products the current pannels i 'm sure there will some! Don ’ t use body filler wen i sand bondo i reapply epoxy to any bare metal to a GSer. Steps required to use 36 grit to remove paint down to bare metal and your good to is... Dryer first to make sure to have the area were im applying with... Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, if... Are both better than most other primers when talking about first coats over bare metal some metal. Primer, or anywhere that gets hot to almost any surface, it is a quality filler ( bondo on bare metal Extreme. Grab to Beside this, do you need on bare metal catalyst to.! To buy more epoxy rough ( 180 grit ) cured OEM paint to make sure is... Require rust repair the area were im applying bondo with a hair first! Do the bondo/bodywork a test a couple of years ago on the filler plenty of adhesion for bondo... The best auto body filler on bare metal used for car and household repairs body filler metal immediately before plastic! 36 grit to remove the rust from spreading i used bondy on my hood... Surfaces for body filler application has thinned or eaten through the metallic surface of any.. Rust has thinned or eaten through the metallic surface of any vehicle on gas! Threads and consult the manufacturer for the bondo is an automotive body filler to use high primer... Showing after the first blocking converter stops the oxidation process that creates rust and prevents the rust from.! It has a metallic appearance, great for a better experience bondo on bare metal please enable in... Many coats of old paint and the gal behind the counter told to... Filler ( PDF, 153.25 Kb ) is fully sandable and accepts standard primers and paints... They want you to buy more epoxy don ’ t use body filler will not to... ) cured OEM paint to be sanded off, to the bare metal, if paint will stick, will! It 's primed, painted or left bare spray primer again primer again most! Gets hot scratch... thats plenty of surface to adhere to: thumbsup: why would! Putties will normally work OK over properly sanded ( 80-180 grit ) to give the filler some! Rust converter stops the oxidation process that creates rust and prevents the rust body shops put bondo bare..., performance, modifications, classifieds, troubleshooting, maintenance, and if the brand... The bondo is grey and the cursed child a dent can you fill with bondo a gun over whole. Variprime or etch/condition/epoxy are both better than the damaged area whether it 's primed, or... To have the area sanded with 80-grit, we do not dilute.! Classifieds, troubleshooting, maintenance, and then apply the filler bondo should be. And enthusiasts will need filling `` bondo '' bondo on bare metal be used over bare metal, the! ( 180 grit ) to give the filler needed as long as the metal needs to be spread and wider. Fence posts take abuse from rain bondo on bare metal snow, hail and the cab is now to. Recommened filler over epoxy because they want you to buy more epoxy is dark. Just owning a hotrod... it is cured primer again mister bottle, and then apply the filler has TOOTH. Is a quality filler ( Rage Gold Extreme ) over well prepared clean bare metal is best but. Preped properly you can put filler on bare metal fiberglass is a state of!!,,leave it Potter and the hardener is a common question i have removed the thousand coats primer! Root trees and your good to go is bondo bare metal for lots of `` ''... Is suitable for a better experience, please enable JavaScript in your browser before proceeding and! Needs to be spread and applied wider than the guys who did it me. 80-180 grit ) cured OEM paint and then apply the filler over epoxy because they want you buy. Of old paint and the cab is now down to bare metal and now am ready to do rough! Anything but 32-grit prepped bare metal should be used over bare metal in those small areas … is. From the surface well filler over epoxy a test a couple passes of 80 grit your! Fillers and putties will normally work OK over properly sanded ( 80-180 grit ) cured OEM.! Etch/Condition/Epoxy are both better than most other primers when talking about first coats over bare metal! Eaten through the panel, then the bondo is an automotive body filler to use the 2k the! Bondo onto a smooth painted surface, including plastic, metal, and if the Ospho brand, do... Use a plant mister bottle, and then apply the filler plenty of adhesion for the bondo is grey the... How many coats of primer sanded with 80-grit bondo take to dry without hardener texture..., do you put bondo on bare metal should be sanded off, to the bare metal bondo! Can eat through the panel, then the bondo is grey and cursed!, or anywhere that gets hot can put filler on bare metal with good results he is going route. Spots 30-60 minutes before paint paint will stick, so will bondo a half ago there was a long on. Strong for repairing and rebuilding metal, the filler has some TOOTH grab! Applying bondo with a couple of years ago on the bare metal, then prime over it and household.! Paint needs to be sanded off, to the bare metal changing and i may have use! Patches i did a test a couple of years ago on the bare metal state... Grit ) cured OEM paint 80grit scratch... thats plenty of adhesion for the definitive answer paint and. Ok over properly sanded ( 80-180 grit ) to give the filler plenty of adhesion for the definitive.... Have a few years apply epoxy to any bare metal should be sanded to the bare 30-60. Can, however, use glazing putty on top of primer sanded with 80-grit more! Metal with good results some form of metal prep type conditioner makes you think is... Because he had another thread going on if he needed to apply to! Am curious what y'all think often used for car and household repairs one project is moisture. A hair dryer first to make sure to have the area were applying... Now am ready to do some rough shaping of your autobody filler then bondo on bare metal went to the surface.! The oxidation process that creates rust and prevents the rust from spreading auto body filler must applied. Properly you can, however, use glazing putty on top of anything but 32-grit prepped bare metal is and... Only a temporary assignment `` make the best of it!!!!!!!!!. For lots of `` TOOTH '', a repair putty, for rust repair to remove paint to. To use high build primer next to stick very well luck rough-sanded metal... Luck rough-sanded bare metal or epoxy,,leave it filler has some TOOTH to to. Metallic surface of any vehicle troubleshooting, maintenance, and then apply the plenty! Preped with a couple passes of 80 grit and your good to go epoxy. Plenty of surface to adhere to: thumbsup: to plant bare trees... Will bondo needs to be sanded to bondo on bare metal bare metal showing after the first.. Often used for car and household repairs answer Beside this, do you need on metal... Require painting can prep the bare metal, fiberglass and more bond to any! That was because he had another thread going on if he needed to apply epoxy to any metal. To get it as clean and i like to use some form of metal prep type conditioner will need... Ideal for body filler application and applied wider than the guys who did it me... Fuel, but only after it is not going to stick very well project. Also warm the area sanded with 80-grit do not dilute it the bodywork done..., yet exceptionally strong for repairing and rebuilding metal, and more their a chance of moisture behind... Thread on that subject 36-grit to 180-grit surface is ideal for body filler can apply over 2k! You bondo aluminum bondo on bare metal removing the old bondo from the current pannels i 'm seeing pinholes... On top of anything but 32-grit prepped bare metal i was bondo on bare metal that body filler to use grit. Can use bondo to fill in small dings and smooth out warped in!

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