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. Step 2 - Priming. 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. Don't apply too much primer surfacer too fast as thick coats trap solvent and can cause shrinkage. Yes you can, but if the damage is minor, I think you would have better luck with a 2 part glazing putty, like Icing. I think you can IF you primer over the ospho first with a non-epoxy primer. Usually it is … In most cases, the filler primer or high-build primer is also a urethane product. After doing a bit of research I purchased two types of … 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. There is a window of opportunity and then it closes. This aerosol spray primer is sandable in only 30 minutes, making for very fast repairs. Your welded seam should be sandblasted and primed immediately. So, epoxy primer first, primer surfacer over that. 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 … 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. Posts. 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. Or do I have to remove all of the etching primer and go to straight … I believe this is why they are compatible. i noticed some low spots on a hood i was sanding and i was wondering if body filler would stick on top of primer? Can I simply scuff the old epoxy and put body filler over it? I recommend spraying an etching primer first. 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. This article was first published in the July 2007 issue of Street Machine. The trick is to use a steel rule to apply filler. 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. No need to use galvy primer at this point. Then simply respray the areas you worked on to re-seal them. And then … Self etching is good as a base. It sands much smoother than regular body filler, especially if you are filling a very small … Do not sand through it. However, if you do a lot of restoration work, this may work great. 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. You still have to scuff the epoxy before putting down fill. 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. JOE S. Member. 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 … One Last Option – Body Filler Over Primer. Many bodymen of the time were not sold on the idea of using plastic body fillers, but over time, it became … Now if its a small dent. Then scuff the epoxy primer before applying the primer surfacer. After final blocking then a seal coat of epoxy is sprayed before color is sprayed. 2 Use multiple coats of primer and sand with very fine … Once the surface is even you can use a coat of primer over the filler … Similarly, should you prime before body filler? Scuffy it after it dries, and then apply your coats of urethane primer. I have been doing this for many years with no adverse results. Polyester Primer Surfacer Excellent build when you can’t … The … 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 … Can i use body filler over primer? 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. I'll do the metal work with the old primer on it. IMO and experience, there is nothing wrong with applying body fillers directly to metal, as they are meant to be. Same reason you dont want it over paint. Some say, epoxy manufacturers actually support this claim, that filler over epoxy is better. Kevin I hope you can give me a definative answer on … Applying Body Filler. There will be parts where the primer is sanded completely off and some new pieces of metal welded in. From there the build primer gets guide coated and block sanded to remove the guide coat. It applies and sands easily and is compatible with most paints. Evercoat’s Quantum1, Rage Ultra, and Rage Optix are all recommended with no primer. Halfords Filler Primer Extra Info. We use 36 grit grinding … How To Use Body Filler. How to Use Auto Primer. Bad News: it take awhile (overnight) to set up before it can be sanded smooth with very fine sandpaper (220 or higher). Fillers designed to go on metal. 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. thanks in advanced! There isn't an epoxy-based body filler anyway, it's all a polyester or vinylester base. And that’s not far from the truth. Or, use a filler that is designed to apply directly over this kind of weld. That is fine to put over primer. If applying filler over a silicon-bronze TIG-weld, apply a coat of epoxy primer before spreading filler. PPG TrueFinish delivers high-quality liquid and powder … Since urethane is only a primer-surfacer, you’ll also need to apply a sealer of … You’re painting over a surface that has stains or is peeling. The epoxy primer needs to "vent" solvents prior to spraying the primer surfacer. It is a very fine grained filler that comes in a tube, similar to tooth paste. The only primer that body filler is recommended to be applied over is epoxy primer. Once the materials arrived it was time to get to work. Because it cures quickly, it’s the method of choice for collision shops. 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. Or do I need to re-spray it with epoxy? Let it dry completely. Kevin shows you the proper way to mix, apply and sand body filler using the Eastwood Contour line of body filler products. As long as you let the primer fully cure and then scuff the surface it will be fine. 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… Read the can for full directions. … This is typical of using Epoxy over body filler because epoxy does not have a lot of filling properties. Here's a technique for applying car body filler (bondo). Not a thick heavy coat but a light to medium wet coat. I did my body work in bare metal and I have most of the car in etching primer. You’re switching from a darker to a lighter paint color. 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. By priming both before and after application of body filler, the filler is isolated from metal … 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. I don’t fully agree with this, yes it can be done, no I don’t think it is the best method. 2) Some of the panels need more significant metal work. With a history dating back to the 1950s, body filler revolutionized auto repairs due to its ease of use when compared to handling lead. The older primers were only water resistant would eventually let moisture in. Moreover, can you put body filler over etch primer? Many discussions arise around whether or not to put filler over epoxy. Some metal preps leave a chemical coating, some just clean the metal totally free of rust. Now, body filler is considered a superior option for fixin If you fill over epoxy it is like all other primers. Having spotted a friend applying filler the hard way I decided a page about this technique could be useful. Technical manuals and auto body teachers say you can apply a urethane primer straight over metal and body filler. 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. And that was with mid-grade materials. 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). Good news: it it provides an extremely smooth surface, filling in any scratches/small imperfections in the Bondo. Automotive plastic body filler, often times called "Bondo," is used quite frequently for automotive repairs and restorations. Even on a car I ospho-d then zinc-chromate primered, the light bondo smear over those portions have never bubbled after 12 years. The Halfords Filler Primer 500ml is essential to obtain the optimum adhesion and performance of the finishing paint. It just doesnt bond good enough. If you're performing any type of bodywork, repairs, or paint updates, you'll need to use primer at some point. 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. SPI epoxy has enough filling properties that you could spray it and block it but it will take more than … 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. Any small imperfections will usually come out and if not shoot some more 2k primer and repeat the guide coat block sanding. I normally do not use this method. Before adding any filler, you should get the metal fairly close. If so, can I thin it? Filler is also designed to be applied direct to metal and so is epoxy 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. Usually a good 2k primer surfacer is sprayed on top of the filler and then blocked. Epoxy and use a glasze puddy. 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, … Could I apply epoxy primer over the etch primer as a form of high build primer? One antique tractor restorer fittingly referred to filler primer paint as little more than liquid body filler. February 23, 2010 at 2:32 pm #32142. I do my filler work over the epoxy and then seal with more epoxy before going to the build primer. Some restorers believe filler primer is little more than liquid body filler. If the filler is uneven, this is going to show up through the paint. Body Filler Over Epoxy Primer Posted: February 23, 2010 By: JOE S Home › Forums › Kevin Tetz’s Korner › Body Filler Over Epoxy Primer. Fillers can be applied over polyester primers because fillers are made with polyester resin. 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. You shouldn't need to sand a large area, just over the filler and then about an inch around. Part 1 of 3. Then I'll spray the whole panel with epoxy. Halfords Filler Primer. The Bondo brand name was created in 1955, just a few years after the use of lead body solder began to be prohibited. Apply directly over this kind of weld for many years with no primer filler the hard way i a. This aerosol spray primer is sanded completely off and some new pieces of welded! The surface it will be fine will be fine, this may great. 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