After doing a bit of research I purchased two types of … Some restorers believe filler primer is little more than liquid body filler. If you're performing any type of bodywork, repairs, or paint updates, you'll need to use primer at some point. Polyester Primer Surfacer Excellent build when you can’t … Or do I need to re-spray it with epoxy? 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. And then … Yes you can, but if the damage is minor, I think you would have better luck with a 2 part glazing putty, like Icing. As long as you let the primer fully cure and then scuff the surface it will be fine. The only primer that body filler is recommended to be applied over is epoxy primer. 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. I recommend spraying an etching primer first. This is typical of using Epoxy over body filler because epoxy does not have a lot of filling properties. PPG TrueFinish delivers high-quality liquid and powder … Since urethane is only a primer-surfacer, you’ll also need to apply a sealer of … Technical manuals and auto body teachers say you can apply a urethane primer straight over metal and body filler. You’re switching from a darker to a lighter paint color. Now if its a small dent. 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. 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… Applying Body Filler. Epoxy and use a glasze puddy. Usually it is … How To Use Body Filler. I normally do not use this method. Automotive plastic body filler, often times called "Bondo," is used quite frequently for automotive repairs and restorations. 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 … 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. Your welded seam should be sandblasted and primed immediately. Fillers designed to go on metal. I don’t fully agree with this, yes it can be done, no I don’t think it is the best method. 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. 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 Bondo brand name was created in 1955, just a few years after the use of lead body solder began to be prohibited. thanks in advanced! IMO and experience, there is nothing wrong with applying body fillers directly to metal, as they are meant to be. 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. Here's a technique for applying car body filler (bondo). Kevin I hope you can give me a definative answer on … It just doesnt bond good enough. It is a very fine grained filler that comes in a tube, similar to tooth paste. I'll do the metal work with the old primer on it. It sands much smoother than regular body filler, especially if you are filling a very small … 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 … Because it cures quickly, it’s the method of choice for collision shops. 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 … Or do I have to remove all of the etching primer and go to straight … 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. The trick is to use a steel rule to apply filler. In most cases, the filler primer or high-build primer is also a urethane product. 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. Posts. Then I'll spray the whole panel with epoxy. Could I apply epoxy primer over the etch primer as a form of high build primer? One Last Option – Body Filler Over Primer. Having spotted a friend applying filler the hard way I decided a page about this technique could be useful. I believe this is why they are compatible. 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. 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? I did my body work in bare metal and I have most of the car in etching primer. 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. Can i use body filler over primer? This article was first published in the July 2007 issue of Street Machine. Fillers can be applied over polyester primers because fillers are made with polyester resin. How to Use Auto Primer. Usually a good 2k primer surfacer is sprayed on top of the filler and then blocked. I think you can IF you primer over the ospho first with a non-epoxy primer. Before adding any filler, you should get the metal fairly close. Don't apply too much primer surfacer too fast as thick coats trap solvent and can cause shrinkage. There isn't an epoxy-based body filler anyway, it's all a polyester or vinylester base. Kevin shows you the proper way to mix, apply and sand body filler using the Eastwood Contour line of body filler products. Then scuff the epoxy primer before applying the primer surfacer. One antique tractor restorer fittingly referred to filler primer paint as little more than liquid body filler. 2 Use multiple coats of primer and sand with very fine … Now, body filler is considered a superior option for fixin The only primer that body filler is recommended to be applied over is epoxy primer. There will be parts where the primer is sanded completely off and some new pieces of metal welded in. 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. The older primers were only water resistant would eventually let moisture in. Similarly, should you prime before body filler? February 23, 2010 at 2:32 pm #32142. And that’s not far from the truth. Evercoat’s Quantum1, Rage Ultra, and Rage Optix are all recommended with no primer. 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. 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). After final blocking then a seal coat of epoxy is sprayed before color is sprayed. The epoxy primer needs to "vent" solvents prior to spraying the primer surfacer. We use 36 grit grinding … JOE S. Member. That is fine to put over primer. Remember, let the primer surfacer dry! If so, can I thin it? Good news: it it provides an extremely smooth surface, filling in any scratches/small imperfections in the Bondo. Any small imperfections will usually come out and if not shoot some more 2k primer and repeat the guide coat block sanding. Or, use a filler that is designed to apply directly over this kind of weld. Do not sand through it. 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 applies and sands easily and is compatible with most paints. Some metal preps leave a chemical coating, some just clean the metal totally free of rust. You’re painting over a surface that has stains or is peeling. Body Filler Over Epoxy Primer Posted: February 23, 2010 By: JOE S Home › Forums › Kevin Tetz’s Korner › Body Filler Over Epoxy Primer. i noticed some low spots on a hood i was sanding and i was wondering if body filler would stick on top of primer? Once the surface is even you can use a coat of primer over the filler … If applying filler over a silicon-bronze TIG-weld, apply a coat of epoxy primer before spreading filler. This aerosol spray primer is sandable in only 30 minutes, making for very fast repairs. Same reason you dont want it over paint. But a key difference with etch primer is that you need to apply your filler … Step 2 - Priming. 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. 2) Some of the panels need more significant metal work. However, if you do a lot of restoration work, this may work great. Not a thick heavy coat but a light to medium wet coat. 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 Halfords Filler Primer 500ml is essential to obtain the optimum adhesion and performance of the finishing paint. Read the can for full directions. You shouldn't need to sand a large area, just over the filler and then about an inch around. You still have to scuff the epoxy before putting down fill. The … 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. No need to use galvy primer at this point. Some say, epoxy manufacturers actually support this claim, that filler over epoxy is better. If you fill over epoxy it is like all other primers. 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 … Self etching is good as a base. … 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. So, epoxy primer first, primer surfacer over that. Then simply respray the areas you worked on to re-seal them. Many bodymen of the time were not sold on the idea of using plastic body fillers, but over time, it became … And that was with mid-grade materials. Bad News: it take awhile (overnight) to set up before it can be sanded smooth with very fine sandpaper (220 or higher). Halfords Filler Primer Extra Info. Many discussions arise around whether or not to put filler over epoxy. 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. Once the materials arrived it was time to get to work. Part 1 of 3. I do my filler work over the epoxy and then seal with more epoxy before going to the build primer. If the filler is uneven, this is going to show up through the paint. There is a window of opportunity and then it closes. 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. Moreover, can you put body filler over etch primer? Let it dry completely. 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