Self-etching primers have to have another primer ove… Local paint store has SEM brand and POR-15 self etching primer. Make sure to be just as careful Craig when sanding around the edges so you…, Enter in your email and password to create a FREE account, https://go.ClassicCarRestorationClub.com/C15970, Sheet Metal Shrinker/Stretcher For Your Classic Car, Customize Your Own Classic Car With Sheet Metal Fabrication, Restoring a Classic Car: Installing Fenders. Classic Car Restoration Club Video Membership. You can apply it over paint or bondo but it is only effective on bare metal. Allow time to dry, then paint. Undercoat in a can may not be quite the overkill that you imagine. Thanks Jim. My email address is ddesoto103@aol.com Thank You. Dry time is about an hour.Jim, Hi I am messing around with a car I have as a daily driver ( a 81 caprice) its still a very nice car for its age, has rust starting. Thanx, I have a '97 Hyundai, I think it has aluminium panels. I then use a primer sealer or epoxy primer to seal up the surface then apply the top coats. Metals with high electromagnetic potentials (aluminium and copper)are so electrically active that they will push the paint off from the back side. Once applied and dried (couple of hours) Use a 3m Scotch Brite pad to knock down any nibs and then shoot the Bare metal primer over the entire Prepped(Acetone wipe down) surface. another good choice would be to spray it with a two-part epoxy primer. What is the purpose of primer? This is achieved by combining an acid with the paint so that the acid microscopically etches the surface of the substrate, thus forming a physical and chemical bond between the two. And the undercarriage parts are rusty too? He explains that it is imperative the doors on a classic car are lined up before installing the fenders because that’s what the fenders are going to fit. I was wondering, can parts be dipped into etching primer? I just went in to my local paint shop to buy some high build primer to put on the self etching primer I used in my engine compartment. I know it's a little over kill but I love my Road Runner and she deserves it. Self etching only needs to be applied to Bare Aluminum. Mark, I’ve got some bare metal panels that I’ve been working on but won’t actually get to base coat painting for quite some time (probably months or up to a year). The steel that is your car wants to turn itself back into the puffy red iron oxide that it was when it was mined. Self-etching primer will get in there and bite into metal for you. Self-etching primer is ideal for painting metal and creates the foundation needed to bond with the paint. The only thing I can imagine is the the paint store guy misunderstood and thought you were using cheap spray can primer and wanted you to take that off. Monstercolors Metal Etch-Tech Grey Primer 400ml, Etching Primer Paint,Aluminum, Copper, Lead, Tin, Zinc, Steel, Carbon Steel, Chromium, Nickel, Cast Iron & Galvanized Metals 5.0 out of 5 … Sheet Metal Fabrication can be a useful and effective tool when you are looking to add customized exterior to your classic car. If your car is going to be outside during the restoration process you may need to re-coat some of your primed areas. Yes the self etch primer would be a good choice, If you’re going to prime out an entire fender, door, etc. Self-etching primer is composed of an acid and zinc. Self-etching primer will not get rid of the rust; it will only paint over it. In this video, learn how to customize your own classic car! Putting more of the primer won’t make it work better. Thank you for that - i am currently trying to put my 39 year old land rover back together and put "what is a self etching primer?" I do not recommend using body filler with self etch primer. Self-etching primer comes as two parts or ready to spray and also comes in aerosol. I think I'd go self-etching primer, then spray can enamel then undercoating in a can.The enamel, and I'd use gloss is going to give you more protection than just the undercoating.And like you said she deserves it.Jim, Does any body make a clear self-etching primer? The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. I bought 1 gallon of etching primer and a can of hardner (normal drying time). The self-etching primer is usually gray or olive drab gray but the color is just there to show you where you’ve put it on and it is very thin and one thin coat is enough. Yes you can. The key to getting paint to stick well to bare metal is all in the metal prep and using the right primers. Etch Primer can be tricky. Your self etch primer should be just a really light piss coat, you don't want a thick coat, it could cause your top coats to crack over time. I had no need for a gallon of DP90 + gallon of Catalyst. Epoxy works pretty good over Acid etch as the epoxy does not tend to melt the etch like, say a 2k primer would, only issue will be is the etch is the weakest link but normally OK, if done this way. Etch Primer can be tricky. At its core, primer is a type of paint. Self etching only needs to be applied to Bare Aluminum. So it’s important that you get all of the scaly rust off. Visit your local store for the widest range of paint & decorating products. Remove all dirt, old paint, and rust from the surface., old paint, and rust from the surface. We would like to offer you a special promotion for your first-year membership. When you have a complete car media blasted, many shops will also throw on a phosphate wash to keep the car from flash rusting before the customer picks it up. I use it when ever I see bare metal or if I’m putting one metal against another. Problem metals like aluminium copper and galvanized benefit from self etching primer. Find Metalshield 300g Etch Primer Spray Paint Light Grey at Bunnings Warehouse. This allows for a nice flow rate that makes the sanding really smooth and gives the classic car a clean finish. Depending on the goal of your project you have a few options after the epoxy primer is sprayed. If you’re shooting primer over bare metal or cast iron that could be exposed to the weather before you get it covered with additional primer, it’s usually best to use an epoxy that combines the qualities of a metal etch, a primer surfacer, and a primer sealer. The new paint needs a little tooth to grab onto and hold it secure to the finish. Can you put body filler over self etching As a If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. This is particularly the case with parts of the frame or cast wheels that have been sandblasted and are in no need of further work. Never had any peel yet, self etching primer I use on bare metal. I was told that because I used spray cans, the primer was no good. Can you put body filler over self etching primer? Mark Oja gives a brief demonstration on how the stretcher works and then shows you an example of a finished product. Allow the final coat of Self Etching Primer to dry for a minimum of 3-4 hours before dry sanding, or 15 minutes before wet sanding with #400 grit sandpaper. Aluminum is especially difficult to paint. However I've never heard of a clear and I've picked the brains of a couple of people I know and none of them has heard of a clear self etching primer.Jim, ddesoto10365 impala hardtop nice! Painting over rusted metal is not recommended. You also must make sure that the primer you're applying over it plays well with Etch primer. I only use self etch on bare metals. Putting more of the primer won’t make it work better. A sheet metal shrinker/stretcher is perfect for any type of metal fabrication you need for your classic car, and it keeps the metal completely flat (without crimps). Can we go ahead and start adding are first coat or will we need som other type of regular primer ? Primer 1 FT302 Reducer PHYSICAL DATA FP301 at 1 to 1 with FT302 is 5.83 pounds per gallon. But I would use either acid etch primer or a good epoxy primer if you plan to prime and paint parts and avoid a phosphate wash completely. That is a worthy project. Especially bare metal that has been exposed to the elements for more than a day or so. Just sanded an old exhaust bracket down to bare metal and was wondering what the best thing to use was since it will be on the bottom of the car. If you wait more than 12 hours you should, like he said scuff down with a Red scotch pad and reapply, then prime. This will stop corrosion expansion until the area once again gets exposed to moisture and air. A note about self-etching primer and aluminum. Phosphate washes are designed to clean and etch the metal in preparation for primer. another good choice would be to spray it with a two-part epoxy primer. That etches into the metal and then the primer chemically bonds to it. Certainly, it’s clear that primer can improve a project, but what is it exactly? It is also sold as an aerosol mixture, which can be used as simply as spray paint. It’s also important to remember that no primer is meant to be a top coat and they lack any real UV resistance. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. Is it better to apply body filler before or after self etching primer? Thanks. Etching primer is a type of primer paint that has a high acid content that allows it to form a superior bond to bare metal. Two light to medium coats will do. Tonight I made my first attempt at spraying Self Etching primer (Nason 491-17) to my hood. Do not use near open flame. Visit your local store for the widest range of paint & decorating products. The self-etching primer is usually gray or olive drab gray but the color is just there to show you where you’ve put it on and it is very thin and one thin coat is enough. Without using an undercoat, the quality of your paint job suffers. Creative Commons Attribution-ShareAlike 2.5 License. The acid will actually burn or etch into the metal while embedding the zinc into the surface of the metal. Wipe the surface with wax and grease remover to get it clean enough so nothing interferes i.e. Follow the manufacturer's instructions on the side of the can for best results. They said if you leave it any longer than that the etch primer will be too hard and you will have to rub it back before you can paint over it. Find Dy-Mark 325g Etch Metal Primer at Bunnings Warehouse. Once the self-etching primer is dry, spray two to three coats of the high-build primer over it, always allowing each coat to dry before applying another one. Allow the final coat of Self Etching Primer to dry for a minimum of 3-4 hours before dry sanding, or 15 minutes before wet sanding with #400 grit sandpaper. Unless you only have a few minor issues to fix, it’s challenging for us do-it-yourselfers to carve out enough time to strip the old paint to bare metal, do the repairs, apply bondo and then spray a layer of self-etching primer before surface rust begins to form on the body. Put on your face mask and spray the entire piece with the self-etching primer. For this I recommend a direct to rust paint I've tried POR15 and Chassis Saver and Hammerite. since scale is harder to remove than most paint why bother, i have been painting machinery with cheap machinery enamel for 20 years, right over scale, most of the time without primer and (maybe i am lucky) never had adherence 7 Inspect the piece visually and also by rubbing your hand over it, and use glazing spot putty to fill in any remaining flaws or pinholes in the primer. You need to use self-etching primer to paint aluminum, but prep work is especially important. Just make sure you shoot the first coat of epoxy with NO reducer, just 1:1 with activator. Here it is: Phosphate washes like After Blast work well if you plan to powder coat or do not plan to prime your parts right away. Self-etching primer is ideal for painting metal and creates the foundation needed to bond with the paint. My son is building a bobber and he wants to leave it bare metal and put a clear coat over it to protect it from rust. Just make sure you shoot the first coat of epoxy with NO reducer, just 1:1 with activator. In other words you can’t apply it and then push the car back outside, it has to have a sealed surface over it, water will reverse the reaction and will pull the zinc back out. Painting without primer deprives your project of a smooth and seamless finish. GregI understand what you are trying to do and I've seen it done nicely a couple of times. You have sandblasted the body and I assume it's because of rust, correct? You can apply it over paint or bondo but it is only effective on bare metal. Just in case you do not remove rust from metal before painting, the rust will eventually remove the paint. Now after spending 175 on a two part metal lock, I am left with the task of stripping my whole engine compartment back down. Is this true, the primer is no good if used from a spray can? Putting more of the primer won’t make it work better. I have searched the forum and not found an answer, so - Can I spray an Acrylic Enamel auto paint (lower end stuff like Kirker) over the Rustoleum Automotive Self-Etching Primer that comes in rattle cans? Self-etching primers can be used on anything from steel or stainless steel, to aluminum, fiberglass or plastic. Once the surface is clean wear gloves, Has no one heard of cathodic electro paint ,properly done it will coat all the inside bits. Now my uestion is it has rust starting but hasnt rusted through, now can I grind it down to bare metal por-15 the rusted areas then put bondo over that or whats the way to go? I must admit it is not real pretty, but from all Ive read it is not that important that the SE primer be very thick. Etch Primer is a paint that is designed to physically bond itself to the substrate to which it is applied. Self-etching primer adheres to tin-plated steel really well and it dries to a somewhat rough finish that makes it easy for the top coat to grab onto. Do not use near open flame. The control bolt will then set the height of fender to height of door…, Craig Hopkins demonstrates how to sand a car fender using a small, tight orbit DA with a cushion pad. Will self etching primer work correctly over body filler? Hello Chap,Top blog with very informative information!I'm Paul from Surrey, England.I, like so many people here have a Land Rover defender 300TDI 1997 and need to understand if I can use a "Self etching primer" for both Aluminium brackets and galvanised door hinges? https://go.ClassicCarRestorationClub.com/C15970, what grade sandpaper is needed to sand paint that’s already on the car for repainting once the sanding has been done do the car have to be primed before painting. Self-etching primer is a primer that can come in an array of mixtures including a compound mixture that you have to mix yourself. It uses a combination of acid and zinc in its formula. This helps remove sanding scratches and small surface defects. For instance steel screws in aluminum or on welds. You did make it clear to him that you were using self etching spray can primer? Any input is greatly appreciated. For small parts or spot repairs I often use SEM self-etch primer. The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. Thanks. Unless you only have a few minor issues to fix, it’s challenging for us do-it-yourselfers to carve out enough time to strip the old paint to bare metal, do the repairs, apply bondo and then spray a layer of self-etching primer before surface rust begins to form on the body. If you do choose to use them I would next apply an epoxy primer as opposed to a self etch primer. Epoxy works pretty good over Acid etch as the epoxy does not tend to melt the etch like, say a 2k primer would, only issue will be is the etch is the weakest link but normally OK, if done this way. Eastwood Epoxy Primer has self etching properties that chemically bond the primer to the metal rather than just a mechanical bond achieved by normal paints. I wanna do this myself cheap as possible, I have a hvlp gun and a compressor. Rust-Oleum®Self Etching Primer is designed to prepare bare metal, aluminum and fiberglass surfaces to promote maximum adhesion and smoothness of the topcoat finish. Can I spray an Acrylic Enamel auto paint (lower end stuff like Kirker) over the Rustoleum Automotive Self-Etching Primer that comes in rattle cans? Hope this helps, Mark This comment has been removed by the author. It’s a paint intended as an undercoat that prepares numerous surfaces for a topcoat. 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