Can i use body filler over primer? After final blocking then a seal coat of epoxy is sprayed before color is sprayed. 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. Before adding any filler, you should get the metal fairly close. Many bodymen of the time were not sold on the idea of using plastic body fillers, but over time, it became … And that’s not far from the truth. If so, can I thin it? You still have to scuff the epoxy before putting down fill. February 23, 2010 at 2:32 pm #32142. The Bondo brand name was created in 1955, just a few years after the use of lead body solder began to be prohibited. If you're performing any type of bodywork, repairs, or paint updates, you'll need to use primer at some point. The … SPI epoxy has enough filling properties that you could spray it and block it but it will take more than … Usually a good 2k primer surfacer is sprayed on top of the filler and then blocked. 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. JOE S. Member. 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. Evercoat’s Quantum1, Rage Ultra, and Rage Optix are all recommended with no primer. Your welded seam should be sandblasted and primed immediately. The trick is to use a steel rule to apply filler. Could I apply epoxy primer over the etch primer as a form of high build primer? Then simply respray the areas you worked on to re-seal them. Once the materials arrived it was time to get to work. 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. Can I simply scuff the old epoxy and put body filler over it? Fillers can be applied over polyester primers because fillers are made with polyester resin. There isn't an epoxy-based body filler anyway, it's all a polyester or vinylester base. 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. Some say, epoxy manufacturers actually support this claim, that filler over epoxy is better. I'll do the metal work with the old primer on it. However, if you do a lot of restoration work, this may work great. 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, … We use 36 grit grinding … 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 … Step 2 - Priming. And that was with mid-grade materials. It applies and sands easily and is compatible with most paints. Posts. 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. … 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. It just doesnt bond good enough. If the filler is uneven, this is going to show up through the paint. By priming both before and after application of body filler, the filler is isolated from metal … The epoxy primer needs to "vent" solvents prior to spraying the primer surfacer. Once the surface is even you can use a coat of primer over the filler … You’re painting over a surface that has stains or is peeling. I don’t fully agree with this, yes it can be done, no I don’t think it is the best method. The older primers were only water resistant would eventually let moisture in. I recommend spraying an etching primer first. In most cases, the filler primer or high-build primer is also a urethane product. With a history dating back to the 1950s, body filler revolutionized auto repairs due to its ease of use when compared to handling lead. It is a very fine grained filler that comes in a tube, similar to tooth paste. 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. Remember, let the primer surfacer dry! thanks in advanced! Many discussions arise around whether or not to put filler over epoxy. Part 1 of 3. Here's a technique for applying car body filler (bondo). This aerosol spray primer is sandable in only 30 minutes, making for very fast repairs. Don't apply too much primer surfacer too fast as thick coats trap solvent and can cause shrinkage. Some restorers believe filler primer is little more than liquid body 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. 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… That is fine to put over primer. Now, body filler is considered a superior option for fixin 2) Some of the panels need more significant metal work. If you fill over epoxy it is like all other primers. I think you can IF you primer over the ospho first with a non-epoxy primer. Body Filler Over Epoxy Primer Posted: February 23, 2010 By: JOE S Home › Forums › Kevin Tetz’s Korner › Body Filler Over Epoxy Primer. Halfords Filler Primer Extra Info. Kevin I hope you can give me a definative answer on … Applying Body Filler. This article was first published in the July 2007 issue of Street Machine. 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. You shouldn't need to sand a large area, just over the filler and then about an inch around. Good news: it it provides an extremely smooth surface, filling in any scratches/small imperfections in the Bondo. 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. As long as you let the primer fully cure and then scuff the surface it will be fine. 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. Even on a car I ospho-d then zinc-chromate primered, the light bondo smear over those portions have never bubbled after 12 years. And then … Let it dry completely. One Last Option – Body Filler Over Primer. Some metal preps leave a chemical coating, some just clean the metal totally free of rust. Self etching is good as a base. So, epoxy primer first, primer surfacer over that. Read the can for full directions. 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). From there the build primer gets guide coated and block sanded to remove the guide coat. Then scuff the epoxy primer before applying the primer surfacer. i noticed some low spots on a hood i was sanding and i was wondering if body filler would stick on top of primer? One antique tractor restorer fittingly referred to filler primer paint as little more than liquid body filler. I did my body work in bare metal and I have most of the car in etching primer. After doing a bit of research I purchased two types of … There will be parts where the primer is sanded completely off and some new pieces of metal welded in. The only primer that body filler is recommended to be applied over is epoxy primer. But a key difference with etch primer is that you need to apply your filler … The only primer that body filler is recommended to be applied over is epoxy primer. Technical manuals and auto body teachers say you can apply a urethane primer straight over metal and body filler. Filler is also designed to be applied direct to metal and so is epoxy 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. Automotive plastic body filler, often times called "Bondo," is used quite frequently for automotive repairs and restorations. Any small imperfections will usually come out and if not shoot some more 2k primer and repeat the guide coat block sanding. 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. If applying filler over a silicon-bronze TIG-weld, apply a coat of epoxy primer before spreading filler. 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. Do not sand through it. Kevin shows you the proper way to mix, apply and sand body filler using the Eastwood Contour line of body filler products. Epoxy and use a glasze puddy. 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