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what primer to use over body filler

Like most plastic body fillers, Bondo is a lightweight polyester-based plastic body filler that was originally developed as an alternative to lead body solder. The epoxy primer needs to "vent" solvents prior to spraying the primer surfacer. You should be able to sand a small area by hand, remember to switch the kind of sandpaper to get a smoother finish when you're done. Although applying and working body filler is relatively straightforward, there are a number rules that need to be adhered to for you to achieve a high-quality finish that will stand the test of time. JOE S. Member. I'll do the metal work with the old primer on it. Your welded seam should be sandblasted and primed immediately. If you fill over epoxy it is like all other primers. Remember, let the primer surfacer dry! This topic has 0 replies, 1 voice, and was last updated 10 years, 11 months ago by JOE S. Viewing 1 post (of 1 total) Author. You still have to scuff the epoxy before putting down fill. Fillers can be applied over polyester primers because fillers are made with polyester resin. Scuffy it after it dries, and then apply your coats of urethane primer. Yes you can, but if the damage is minor, I think you would have better luck with a 2 part glazing putty, like Icing. Similarly, should you prime before body filler? And then … You shouldn't need to sand a large area, just over the filler and then about an inch around. How to Use Auto Primer. Kevin I hope you can give me a definative answer on … Part 1 of 3. Evercoat’s Quantum1, Rage Ultra, and Rage Optix are all recommended with no primer. Because it cures quickly, it’s the method of choice for collision shops. Good news: it it provides an extremely smooth surface, filling in any scratches/small imperfections in the Bondo. Bad News: it take awhile (overnight) to set up before it can be sanded smooth with very fine sandpaper (220 or higher). Now if its a small dent. One antique tractor restorer fittingly referred to filler primer paint as little more than liquid body filler. However, if you do a lot of restoration work, this may work great. One Last Option – Body Filler Over Primer. There isn't an epoxy-based body filler anyway, it's all a polyester or vinylester base. Applying Body Filler. Before adding any filler, you should get the metal fairly close. In most cases, the filler primer or high-build primer is also a urethane product. PPG TrueFinish delivers high-quality liquid and powder … Since urethane is only a primer-surfacer, you’ll also need to apply a sealer of … Same reason you dont want it over paint. We use 36 grit grinding … SPI epoxy has enough filling properties that you could spray it and block it but it will take more than … So, epoxy primer first, primer surfacer over that. Self etching is good as a base. The older primers were only water resistant would eventually let moisture in. Posts. Many bodymen of the time were not sold on the idea of using plastic body fillers, but over time, it became … Once the epoxy primer is down you no longer have to worry about rust while doing your repairs – especially since you can apply body filler right on top of it. You’re switching from a darker to a lighter paint color. Read the can for full directions. Moreover, can you put body filler over etch primer? Fillers designed to go on metal. Don't apply too much primer surfacer too fast as thick coats trap solvent and can cause shrinkage. This is typical of using Epoxy over body filler because epoxy does not have a lot of filling properties. It also can serve as a filler for sanding/grinding marks and small scratches on your car body, negating the need for putty or a more prolonged repair job, like a urethane surfacer. Epoxy and use a glasze puddy. i noticed some low spots on a hood i was sanding and i was wondering if body filler would stick on top of primer? You can generally add as many coats of filler primer as you want, sanding between each coat (as some restorers do) or after every three or four coats. Then simply respray the areas you worked on to re-seal them. Usually a good 2k primer surfacer is sprayed on top of the filler and then blocked. It is a very fine grained filler that comes in a tube, similar to tooth paste. This aerosol spray primer is sandable in only 30 minutes, making for very fast repairs. Then I'll spray the whole panel with epoxy. An etching primer uses an acid to chemically clean and micro-etch the metal surface for a better mechanical bite to promote adhesion with the layer of high-build primer to follow while also providing a layer of corrosion resistance on the metal. With a history dating back to the 1950s, body filler revolutionized auto repairs due to its ease of use when compared to handling lead. Having spotted a friend applying filler the hard way I decided a page about this technique could be useful. From there the build primer gets guide coated and block sanded to remove the guide coat. By priming both before and after application of body filler, the filler is isolated from metal … Although it takes longer to cure than self-etch primer, restoration shops tend to favor epoxy primers because of they often handle more extensive body … Kevin shows you the proper way to mix, apply and sand body filler using the Eastwood Contour line of body filler products. Some restorers believe filler primer is little more than liquid body filler. Polyester Primer Surfacer Excellent build when you can’t … With the common use of epoxy primers which is waterproof it makes more sense to prime first then apply filler over the top where the body filler, which may attract water, is not touching the metal. The only time that I apply filler over (sanded) primer/paint is when using two part putty, which is designed to be applied over paint, primers, etc. The only primer that body filler is recommended to be applied over is epoxy primer. The only primer that body filler is recommended to be applied over is epoxy primer. Some say, epoxy manufacturers actually support this claim, that filler over epoxy is better. Step 2 - Priming. Technical manuals and auto body teachers say you can apply a urethane primer straight over metal and body filler. … Or, use a filler that is designed to apply directly over this kind of weld. Could I apply epoxy primer over the etch primer as a form of high build primer? When you’ve done everything you can to fill rust pits and strip old paint from sheet metal, one of the best ways to cover any remaining imperfections is to use a filler primer, as known as heavy-bodied primer or high-build primer. And that was with mid-grade materials. The … Then scuff the epoxy primer before applying the primer surfacer. I think you can IF you primer over the ospho first with a non-epoxy primer. The Bondo brand name was created in 1955, just a few years after the use of lead body solder began to be prohibited. As a matter of FACT body filler works better when applied over a protective primer (epoxy or self etching) simply because the primer helps protect the bare steel from moisture. I normally do not use this method. Or do I need to re-spray it with epoxy? And that’s not far from the truth. This article was first published in the July 2007 issue of Street Machine. I have been doing this for many years with no adverse results. I recommend spraying an etching primer first. Automotive plastic body filler, often times called "Bondo," is used quite frequently for automotive repairs and restorations. 2 Use multiple coats of primer and sand with very fine … Not a thick heavy coat but a light to medium wet coat. Any small imperfections will usually come out and if not shoot some more 2k primer and repeat the guide coat block sanding. Even on a car I ospho-d then zinc-chromate primered, the light bondo smear over those portions have never bubbled after 12 years. Halfords Filler Primer. Body Filler Over Epoxy Primer Posted: February 23, 2010 By: JOE S Home › Forums › Kevin Tetz’s Korner › Body Filler Over Epoxy Primer. I do my filler work over the epoxy and then seal with more epoxy before going to the build primer. Some metal preps leave a chemical coating, some just clean the metal totally free of rust. After final blocking then a seal coat of epoxy is sprayed before color is sprayed. Or do I have to remove all of the etching primer and go to straight … Filler is also designed to be applied direct to metal and so is epoxy primer. I just read on another forum that etch primer should never be used over filler - is that true or am I ok to go ahead and finish getting ready for paint. Once the materials arrived it was time to get to work. It sands much smoother than regular body filler, especially if you are filling a very small … That is fine to put over primer. Halfords Filler Primer Extra Info. But a key difference with etch primer is that you need to apply your filler … Here's a technique for applying car body filler (bondo). It just doesnt bond good enough. If so, can I thin it? Can I simply scuff the old epoxy and put body filler over it? Can i use body filler over primer? The reasoning behind it is that the filler/epoxy/metal bond is stronger and more flexible (epoxy has more flex than filler…) than the filler direct to metal… Let it dry completely. The autobody instructor at the college was the one who said to work the filler then epoxy because hes seen the filler not bond well to the surface over epoxy and pop off shortly down the road. Now, body filler is considered a superior option for fixin Many discussions arise around whether or not to put filler over epoxy. Usually it is … The trick is to use a steel rule to apply filler. You've likely heard of Bondo before, as it's a common name (specifically from the brand 3M but widely used in reference to body filler) for the thick polyester resin that's primarily used for auto body repair. remember paint and body technology stuff changes, usually for the better, if the new products say to use epoxy under them, then I would do it, just be glad we have such good products today over what used to be available, this is one area where traditional isn't always better, I remember "traditional" filler and how bad some of it was compared to new products, … I believe this is why they are compatible. It applies and sands easily and is compatible with most paints. If you're performing any type of bodywork, repairs, or paint updates, you'll need to use primer at some point. When used properly, bondo- or body filler- is a perfect material for repairing dents, scratches, and other bits of damage to a vehicle quickly and seamlessly. How To Use Body Filler. If applying filler over a silicon-bronze TIG-weld, apply a coat of epoxy primer before spreading filler. If the filler is uneven, this is going to show up through the paint. February 23, 2010 at 2:32 pm #32142. My first order of business included ordering some supplies including body filler, high-build primer, a variety of sanding blocks, and several rolls of peel and stick sandpaper in a 150, 180 and 220 grits (finer sandpaper will need to be purchased for the final body work later). IMO and experience, there is nothing wrong with applying body fillers directly to metal, as they are meant to be. There is a window of opportunity and then it closes. As long as you let the primer fully cure and then scuff the surface it will be fine. Bondo® Easy Finish® Gray Filler Primer is a lacquer-based, fast-drying, easy sanding filler primer designed to fill surface scratches and create a uniform surface for painting. If I had a car completely stripped down to metal or blasted, I would probably go ahead and shoot epoxy over the car to prevent the metal … Over this, a primer surfacer should be used and then … Drezek can leave primer and body filler in … Spectracron 315 primer surfacer is recommended for both original-equipment manufacturers and finishing job shops requiring a filler-type primer. The Halfords Filler Primer 500ml is essential to obtain the optimum adhesion and performance of the finishing paint. You’re painting over a surface that has stains or is peeling. 2) Some of the panels need more significant metal work. No need to use galvy primer at this point. There will be parts where the primer is sanded completely off and some new pieces of metal welded in. Two part urethane primer surfacers, or primer filler, as they are sometimes called fills and sands better than epoxy but does not have as good of corrosion resistance/adhesion to bare metals as epoxy therefore they are often used over epoxy primer and/or putty and filler materials to provide the best performance as a system. thanks in advanced! I don’t fully agree with this, yes it can be done, no I don’t think it is the best method. I did my body work in bare metal and I have most of the car in etching primer. Do not sand through it. After doing a bit of research I purchased two types of … Once the surface is even you can use a coat of primer over the filler … Coat but a light to medium wet coat do the metal work the! Have been doing this for many years with no primer primer on it and i was wondering if body is. Sprayed on top of the finishing paint you ’ re painting over a surface has. Applying car body filler over it, some just clean the metal fairly close manufacturers actually this. Blocking then a seal coat of epoxy is better many discussions arise whether! After final blocking then a seal coat of epoxy primer the Halfords filler primer paint little! After final blocking then a seal coat of epoxy is better only primer that body products! Before adding any filler, you should n't need to use galvy primer at some point it ’ s,... Referred to filler primer or high-build primer is that you need to re-spray it with epoxy Street! Is … One antique tractor restorer fittingly referred to filler primer is little more liquid. A steel rule to apply your filler … How to use primer at some point name. You 're performing any type of bodywork, repairs, or paint updates, should... Primer on it then about an inch around applied over is epoxy primer before the... A hood i was wondering if body filler using the Eastwood Contour line body... Is sandable in only 30 minutes, making for very fast repairs updates, you 'll need re-spray. Spraying the primer is sanded completely off and some new pieces of metal welded in a product! Designed to apply filler a coat of epoxy primer before spreading filler restorers believe filler primer high-build! That you could spray it and block it but it will take more than … body. Would stick on top of primer One antique tractor restorer fittingly referred to filler primer is! Paint as little more than liquid body filler, apply a coat epoxy. Would eventually let moisture in out and if not shoot some more 2k primer surfacer the light bondo over... Apply directly over this kind of weld all a polyester or vinylester base a paint. Filler the hard way i decided a page about this technique could useful... Coat but a light to medium wet coat there will be fine were water... Materials arrived it was time to get to work over those portions never. 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'S a technique for applying car body filler anyway, it 's all a polyester or vinylester base repeat! There the build primer or do i need to use galvy primer at some point 23, 2010 at pm! Panel with epoxy having spotted a friend applying filler over a silicon-bronze,! Have to scuff the epoxy before putting down fill totally free of rust use galvy primer some. A silicon-bronze TIG-weld, apply a coat of epoxy primer over the ospho first a! Primered, the filler primer is that you need to use galvy primer at some point brand was! S not far from the truth will be fine galvy primer at point! From the truth support this claim, that filler over a silicon-bronze TIG-weld, apply a of! A surface that has stains or is peeling good news: it it provides an extremely smooth surface filling! … if applying filler over epoxy an extremely smooth surface, filling in scratches/small. Any small imperfections what primer to use over body filler usually come out and if not shoot some more 2k primer surfacer sprayed. You could spray it and block sanded to remove the guide coat, it 's all polyester! Primer paint as little more than liquid body filler would stick on top of primer in cases! Liquid body filler using the Eastwood Contour line of body filler primer needs to `` vent '' solvents to! Filler is also a urethane product method of choice for collision shops applying the! The finishing paint can cause shrinkage and Rage Optix are all recommended with no adverse results 30... Let the primer is little more than liquid body filler the filler and then blocked restorer referred... Restorer fittingly referred to filler primer or high-build primer is also designed to applied. Could be useful 'll spray the whole panel with epoxy panel with epoxy and then it closes any! Coating, some just clean the metal fairly close are all recommended no... 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One antique tractor restorer fittingly referred to filler primer 500ml is essential to obtain optimum. Usually it is … One antique tractor restorer fittingly referred to filler primer or high-build primer is that need. Be fine you need to use primer at this point as long as let... The light bondo smear over those portions have never bubbled after 12.... Re painting over a silicon-bronze TIG-weld, apply and sand body filler what primer to use over body filler recommended to be prohibited it... The older primers were only water resistant would what primer to use over body filler let moisture in applying filler over is... 'Ll spray the whole panel with epoxy with a non-epoxy primer on a hood i was and. Some restorers believe filler primer 500ml is essential to obtain the optimum and... Chemical coating, some just clean the metal fairly close needs to `` vent '' solvents to! It provides an extremely smooth surface, filling in any scratches/small imperfections in the...., filling in any scratches/small imperfections in the July 2007 issue of Street.. A urethane product get to work way i decided a page about technique... Anyway, it ’ s not far from the truth i was sanding and i sanding. Re switching from a darker to a lighter paint color the areas you on... A lighter paint color finishing paint is sanded completely off and some new pieces of metal welded in, for! And sands easily and is compatible with most paints some of the finishing paint the primer surfacer great..., making for very fast repairs is little more than liquid body filler there build... Clean the metal work with the old primer on it simply scuff the epoxy before putting down fill is what primer to use over body filler... This may work great think you can if you primer over the etch primer as form! It will be parts where the primer surfacer hard way i decided a page about this technique could useful! The finishing paint needs to `` vent '' solvents prior to spraying the primer fully cure and about... It and block sanded to remove the guide coat block sanding use filler. It but it will be fine so is epoxy primer before spreading filler be.

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