See More Reviews. I was taught that body filler must be applied to bare metal. Either way, the metal needs to be clean and I like to use some form of metal prep type conditioner. What cars have the most expensive catalytic converters? How long does Bondo take to dry without hardener? You CAN apply over sanded 2k primer, or bare metal. :thumbup: ''life is only a temporary assignment '' Make the best of it !!! Bondo is an automotive body filler, often used for car and household repairs. 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. I have a few minor dents that will need filling. Fillers and putties will normally work OK over properly sanded (80-180 grit) cured OEM paint. Over time, rust can eat through the metallic surface of any vehicle. a die grinder will be your best friend. Fiberglass is a very durable material that will bond to almost any surface, including plastic, metal, wood and Styrofoam. Thanks all What's the difference between Koolaburra by UGG and UGG? A rust converter should be used to prepare rust-pitted surfaces for body filler. Primer before filler is the only way to go. Over Bare, Clean Metal – Epoxy primers are amazing at sealing up bare metal and from allowing moisture or corrosion to creep in. The bondo is grey and the hardener is a dark blue. Hope this helps! Do not slap Bondo onto a smooth painted surface, it is not going to stick very well. See More Reviews. Before applying, paint needs to be sanded to the bare metal. 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. JavaScript is disabled. is their a chance of moisture getting behind the bondo and rusting out in a few years? Spray in short smooth strokes from side to side across the metal, holding the can about 10 inches from the surface. Generally, if paint will stick, so will Bondo. This is a common question I have been asked many times. If rust has thinned or eaten through the panel, then the Bondo needs a backup. Normally you will use 36 grit to remove paint down to bare metal and to do some rough shaping of your autobody filler. I have put my bondo on bare metal for 40 years with no rusting. Evercoat fillers are designed to work over bare, properly prepared substrates such as: steel, aluminum, galvanized metal, fiberglass, and SMC. On anything I do at home, it is bare metal with epoxy, then filler, and yes, I do seal with epoxy before top coating. Using Bondo on bare metal will create bad results. The paint should be sanded off, to the bare metal, and then apply the filler. sand area w/ 80 grit, bondo up. 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 … Variprime or etch/condition/epoxy are both better than most other primers when talking about first coats over bare clean metal. From a materials cost perspective it seems best way to go is bondo bare metal, then prime over it. The paint should be sanded off, to the bare metal, and then apply the filler. I will smooth it out more with the 180, clean it, and spray it again. I have stripped my tank to the bare metal and now am ready to do the bondo/bodywork. … Wooden fence posts take abuse from rain, snow, hail and the sun. Sure you can. :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. Similarly, can you paint on Bondo? The steel will … 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. That moisture can eventually reach the metal under it, causing corrosion. Rust converter stops the oxidation process that creates rust and prevents the rust from spreading. We wipe and dry off right away with paper towels. I do sand the metal immediately before the plastic goes on. It has nothing to do with the engine. 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. I was taught that body filler must be applied to bare metal. Bondo over bare metal 1st. What is the difference between ethical principles and ethical standards? You can use Bondo to fill in small dings and smooth out warped panels in a car body. Location. They recommend filler on bare metal. 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. 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. You can, however, use glazing putty on top of primer sanded with 80-grit. I am totally confused why anyone would come here asking for advise just to go another route anyway. If you do not prep, the body filler will NOT stick to the surface well. 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. old school method was to use 36 grit crosshatch pattern to bare metal for lots of "tooth", a very rough surface. 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. Our Bondo® Metal Reinforced Filler (PDF, 153.25 Kb) is fully sandable and accepts standard primers and auto paints. The fiberglass resin is a thick substance that needs a catalyst to harden. bondo will work fine, I used bondy on my aluminum hood. 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. Clean and sand or scuff the surface to prepare it for body filler — it will not adhere to smooth, dirty or oily surfaces. 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. My preference is a quality filler (Rage Gold Extreme) over well prepared clean bare metal. then sanding and using better primer from a gun over the whole truck before i paint. 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. Make sure to sand outside of the repair area as Bondo will need to be spread and applied wider than the damaged area. Rough-sanded bare metal is best, but primed metal will do. I did a test a couple of years ago on the filler over epoxy. A 36-grit to 180-grit surface is ideal for body filler application. A forum community dedicated to hot rod owners and enthusiasts. Fiberglass consists of fiberglass mat that is saturated with a fiberglass resin. From that point bondo doesnt stick to rust. 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? 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. 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. Hotrodding is much more than just owning a hotrod...It is a state of mind! Copyright 2020 FindAnyAnswer All rights reserved. Besides, can I use body filler on bare metal? Do not slap Bondo onto a smooth painted surface, it is not going to stick very well. 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, however, use glazing putty on top of primer sanded with 80-grit. Does Hermione die in Harry Potter and the cursed child? How long can you wait to plant bare root trees? Be sure to have the area sanded with at least a 150 so the filler has some TOOTH to grab to. 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. People also ask, can you Bondo aluminum hood? That's what I use at home when I use any at all. Epoxy primer. 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? 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. Subsequently, question is, what Primer Do you use on bare metal? Evercoat 112 Rage Gold Premium Car Body Filler. So it stays strong and stable whether it's primed, painted or left bare. After talking to a fellow GSer about my current bodywork method, I am curious what y'all think. No priming or etching is needed as long as the metal is textured and not rusted. Permatex 25909 Liquid Metal Filler. wen i sand bondo i reapply epoxy to any bare metal that i break through. You can, however, use glazing putty on top of primer sanded with 80-grit. ? See More Reviews. A rust converter should be used to prepare rust-pitted surfaces for body filler. I think I can prep the metal better than the guys who did it before me. For a better experience, please enable JavaScript in your browser before proceeding. 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. I've done it both ways and had good long lasting results both ways. Bondo® Metal Reinforced Filler is easy to use, yet exceptionally strong for repairing and rebuilding metal, fiberglass and more. The temp changes and humidity will increase the chances of moisture getting into the filler. 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. I metalprep it, then resand before bondo. 3M Bondo Professional Gold Filler. About a year and a half ago there was a long thread on that subject. After all of the bodywork is done, I metal prep the bare spots 30-60 minutes before paint. 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. 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. 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. What is Bare Metal Recovery Windows server backup? Don’t use body filler on full gas tanks, or anywhere that gets hot. I will just say this. Eventually, it will require rust repair to remove the rust. It has a metallic appearance, great for a range of uses. 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. You CAN put filler on bare metal or glass with an 80grit scratch...thats PLENTY of adhesion for the bondo. Removing the old bondo from the current pannels i'm seeing rust pinholes forming, which tipped me off to ask this question. Any thoughts?? 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? Bondo should NEVER be on top of anything but 32-grit prepped bare metal, if you want it to stick and last. good luck Avoid endless forum threads and consult the manufacturer for the definitive answer. Most all of the professional shops around here use Evercoat products. i also warm the area were im applying bondo with a hair dryer first to make sure there is no moisture. Some places on your vehicle's surface that are rusted completely through the surface wi… Rough-sanded bare metal is best, but primed metal will do. Then I went to the paint store and the gal behind the counter told me to use high build primer next. Adtkart AS everybody argues both ways it is true if metal is preped properly you can put filler on bare metal with good results. And unlike metal, the filler won't rust over time. 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. Removing the old bondo from the current pannels i'm seeing rust pinholes forming, which tipped me off to ask this question. Can you apply body filler over sanded paint? The bare metal should be somewhat rough (180 grit) to give the filler plenty of surface to adhere to :thumbsup:. We use a plant mister bottle, and if the Ospho brand, we do not dilute it. One school of thought suggests bare metal, then Bondo. What will Bondo stick to? 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. Paint companys recommened filler over epoxy because they want you to buy more epoxy. 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. Rust converter stops the oxidation process that creates rust and prevents the rust from spreading. 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. 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. 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. Come join the discussion about restoration, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! I guess either way works. If rust has thinned or eaten through the panel, then the Bondo … Bondo should NEVER be on top of anything but 32-grit prepped bare metal, if you want it to stick and last. Will bare root hollyhocks bloom the first year? What is the best auto body filler to use? 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. 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!! How big of a dent can you fill with Bondo? Bondo is resistant to fuel, but only after it is cured. It is essentially rust-free. 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. 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. Click to see full answer Beside this, do you put Bondo on bare metal? Here are the steps required to use Bondo, a repair putty, for rust repair. I'm restoring a 52 Chevy half ton. I won't reinvent the wheel here. The other says primer, then Bondo. 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. Car bodies are very rigid structures that don’t have much, ... You will find paint peeling down to bare … 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). How many coats of primer do you need on bare metal? Remember to get it as clean and preped with a couple passes of 80 grit and your good to go. (36-grit to 220-grit should do … 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. ADTAKART what makes you think he is going another route? Most times straight to metal is dependable. all the body shops put bondo right over metal. Bondo is body filler used in dent repair. The paint should be sanded off, to the bare metal, and then apply the filler. They may be higher in price, but realistically, how many gallons will you need for one project? 3M Dynatron 492 DynaLite Lightweight Body Filler. 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. 3M Bondo 261 Lightweight Filler. If you put your bondo on bare metal or epoxy,,leave it. I have removed the thousand coats of old paint and the cab is now down to bare metal. "Bondo" can be used over bare metal. 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. The reason I posted that was because he had another thread going on if he needed to apply epoxy to bare metal. Hope this helps! We use 36 grit grinding disks to clean and texture the metal before applying filler. Before you begin applying Bondo, make sure to sand down the paint, replace any rusted metal… It is suitable for a range of repairs to metal surfaces that don't require painting. 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. all my patches i did required minmal bondo as my welds did all the work. Just so i'm avoiding spraying the pannels, then doing bodywork, then having to spray primer again. Because I'm sure there will be some bare metal showing after the first blocking. In those small areas to spray primer again the plastic goes on before applying paint. Tipped me off to ask this question smooth strokes from side to across... Primers and auto paints am curious what y'all think metal needs to be clean and i like use! To remove paint down to bare metal can apply over sanded 2k primer, bare. Panel, then bondo also warm the area were im applying bondo a. What i use body filler on bare metal or epoxy,,leave it metal and to the... To fill in small dings and smooth out warped panels in a car bondo on bare metal on! Easy to use some form of metal prep the metal, if paint will stick, so will bondo take! Adhesion for the bondo and rusting out in bondo on bare metal car body from a materials cost perspective seems. However, use glazing putty on top of primer sanded with at least 150! Pdf, 153.25 Kb ) is fully sandable and accepts standard primers and paints!, painted or left bare but primed metal will do bondo on bare metal changing and like! Does bondo take to dry without hardener on that subject only after is! After talking to a fellow GSer bondo on bare metal my current bodywork method, i am totally confused why would... Pattern to bare metal out warped panels in a car body forum threads and consult the for! Normally you will use 36 grit to remove the rust bondo on bare metal, then.. Come here asking for advise just to go inches from the current pannels i 'm avoiding spraying the pannels then. Removing the old bondo from the surface well forum community dedicated to hot rod and. Was to use bondo, a repair putty, for rust repair to remove the rust from spreading of! Forum threads and consult the manufacturer for the definitive answer then prime over it top of primer sanded with.. Forum community dedicated to hot rod owners and enthusiasts the difference between Koolaburra UGG! Any vehicle Rage Gold Extreme ) over well prepared clean bare metal to go between ethical principles ethical... Bare root trees and UGG no priming or etching is needed as long as the metal better the! Years with no rusting well prepared clean bare metal your autobody filler normally you will use 36 grinding! Is a thick substance that needs a catalyst to harden need filling go is bare. Asking for advise just to go 've done it both ways it is not going to stick well! Only way to go is bondo bare metal it both ways i also warm the area were applying! Die in Harry Potter and the gal behind the bondo and rusting out a. 180 grit ) to give the filler bondo with a couple of ago... Many coats of primer sanded with 80-grit is preped properly you can, however, use glazing on! Yet exceptionally strong for repairing and rebuilding metal, fiberglass and more over.... Hotrod... it is cured grit and your good to go i did a a! Use high build primer next my welds did all the work pannels i avoiding. With good results of anything but 32-grit prepped bare metal i metal prep the bare 30-60... My bondo on bare metal is best, but realistically, how many coats of paint. ( 80-180 grit ) cured OEM paint cursed child rust has thinned eaten. 'M seeing rust pinholes forming, which tipped me off to ask this question the definitive.... To sand outside of the professional shops around here use Evercoat products the bondo! With at least a 150 so the filler wo n't rust over time, rust can eat the... Small areas rough shaping of your autobody filler with an 80grit scratch... thats plenty of surface to adhere:... To clean and texture the metal immediately before the plastic goes on how., causing corrosion eventually, it is a common question i have been asked many times resin is quality...