The new paint needs a little tooth to grab onto and hold it secure to the finish. Visit your local store for the widest range of paint & decorating products. Self Etching primer is a coating that is meant to be applied directly over bare metal. We are convinced you will enjoy the benefits of becoming a member and having access to the best instructional how to videos and professional tips. GregI understand what you are trying to do and I've seen it done nicely a couple of times. Self etching primer contains a mild acid that actually etches the bare metal to create a superior bond between the primer and the metal. At its core, primer is a type of paint. A site for the discussion of automobile paint and painting. I was told that because I used spray cans, the primer was no good. Find Metalshield 300g Etch Primer Spray Paint Light Grey at Bunnings Warehouse. Self-etching primer will get in there and bite into metal for you. 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. That is a worthy project. Yes the self etch primer would be a good choice, If you’re going to prime out an entire fender, door, etc. 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 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. Custom Shop Premium Self Etching Acid Etch Primer, 1 Quart - Ready to Spray Paint, Excellent Adhesion to Bare Metal, Steel, Aluminum, Fiberglass - Use on Automotive Car … The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. I do not recommend using body filler with self etch primer. If you do choose to use them I would next apply an epoxy primer as opposed to a self etch primer. 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? You also must make sure that the primer you're applying over it plays well with Etch primer. If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. What primer to put over Etching Primer? I had no need for a gallon of DP90 + gallon of Catalyst. I know it's a little over kill but I love my Road Runner and she deserves it. 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. Self-etching primers can be used on anything from steel or stainless steel, to aluminum, fiberglass or plastic. Do you have any suggestions on the best way to do this? That etches into the metal and then the primer chemically bonds to it. What’s stopping anyone from just applying his or her paint without primer? Self-etching primer will get in there and bite into metal for you. 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. This helps remove sanding scratches and small surface defects. I was wondering, can parts be dipped into etching primer? Can we go ahead and start adding are first coat or will we need som other type of regular primer ? Phosphate washes are designed to clean and etch the metal in preparation for primer. And the undercarriage parts are rusty too? Find Dy-Mark 325g Etch Metal Primer at Bunnings Warehouse. When doing major or even minor work on older cars your going to run into rust. If you plan to do body work after priming, epoxy primers are a better choice. Once the surface is clean wear gloves, Has no one heard of cathodic electro paint ,properly done it will coat all the inside bits. Yes you can. Hope this helps, Mark Self-etching primer is composed of an acid and zinc. The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. Without using an undercoat, the quality of your paint job suffers. 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. Will I need an etching primer for this? For this I recommend a direct to rust paint I've tried POR15 and Chassis Saver and Hammerite. another good choice would be to spray it with a two-part epoxy primer. I'm thinking I can use etching primer then undercoat-in-a-can on top of that? Certainly, it’s clear that primer can improve a project, but what is it exactly? 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. It’s also important to remember that no primer is meant to be a top coat and they lack any real UV resistance. Is it better to apply body filler before or after self etching primer? Good paint adhesion is as much a mechanical bond as it is a chemical bond, so sanding with a finer grit paper may actually shorten the length of time your paint remains attached to the old 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! Putting more of the primer won’t make it work better. Remove all dirt, old paint, and rust from the surface., old paint, and rust from the surface. 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. 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. Depending on the goal of your project you have a few options after the epoxy primer is sprayed. 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. Mark I was hoping to get away from blasting the frame so I dont have to remove the entire steering/A-arm assemblies and rear axle assembly with 3 arms. Any input is greatly appreciated. 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. 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. into google because i had seen it being sold by a couple of on-line retailers and wanted to know more about it - this really helped - thank you! Sheet Metal Fabrication can be a useful and effective tool when you are looking to add customized exterior to your classic car. I then use a primer sealer or epoxy primer to seal up the surface then apply the top coats. Self-Etching Primer Dupli-Color® Self-Etching Primer etches and primes bare metal in one step, making it ideal to use as the first step in all automotive priming projects and for use on spot repairs. For galvanized the chemistry is a little different but the result is the same just make sure your surface is clean before you begin.Jim. 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. 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. Thank you for your patience while i got you the response from the experts. Put on your face mask and spray the entire piece with the self-etching primer. 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. Allow time to dry between coats. 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. 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. 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. Etch Primer can be tricky. 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. 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. Primer Self Etching Beige for Bare Metal Aluminium Plastic 4.8 out of 5 stars (12) Total ratings 12, £8.39 New Go to next slide - Best selling All Auction Buy it now Sort: Best Match Best Match Price + … Putting more of the primer won’t make it work better. A note about self-etching primer and aluminum. In this video, learn how to customize your own classic car! For small parts or spot repairs I often use SEM self-etch primer. 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. 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). Now after spending 175 on a two part metal lock, I am left with the task of stripping my whole engine compartment back down. What is recommended to prep the frame for priming and painting. Hi What’s the next step after selfech priming ? Once the area is coated in self etching primer more traditional primers can be used to build out the surface. Just in case you do not remove rust from metal before painting, the rust will eventually remove the paint. 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. You need to use self-etching primer to paint aluminum, but prep work is especially important. Is the self etching primer something I can spray on to protect it from rust and leave it until I’m finally ready down the road to apply the high build primer? 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? You can apply it over paint or bondo but it is only effective on bare metal. I have a project where is want primer and paint inside and out on some parts I'm restoring or do you know if there is something I can use to spray paint into hollow areas of parts? If it is applied to anything but bare metal you could risk adhesion issues (especially if the base paint wasn't prepared correctly. 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. Wipe the surface with wax and grease remover to get it clean enough so nothing interferes i.e. (poly primer, that additive stuff, chassis paint, even a little Evercoat OEM Metal Glaze just in case) The frame was sanded down and sprayed with an etching primer from a spray can. It uses a combination of acid and zinc in its formula. Follow the manufacturer's instructions on the side of the can for best results. Self-etching primer is ideal for painting metal and creates the foundation needed to bond with the paint. Self etching only needs to be applied to Bare Aluminum. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. 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. Etch Primer can be tricky. Metals with high electromagnetic potentials (aluminium and copper)are so electrically active that they will push the paint off from the back side. I look forward to your videos every week and always seem to learn something new. The steel that is your car wants to turn itself back into the puffy red iron oxide that it was when it was mined. Thanks Jim. Let’s start at the beginning. Especially bare metal that has been exposed to the elements for more than a day or so. Self-etching primers have to have another primer ove… Painting without primer deprives your project of a smooth and seamless finish. Aluminum is especially difficult to paint. Visit your local store for the widest range of paint & decorating products. Mark Oja works on a rare, custom Blown Fiat and adds his own custom hood using sheet metal fabrication made from cheap…, Craig Hopkins provides helpful tips for restoring a classic car in this video. .DESCRIPTION AND USES. This will stop corrosion expansion until the area once again gets exposed to moisture and air. Yes the self etch primer would be a good choice, If you’re going to prime out an entire fender, door, etc. 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. The acid, usually phosphoric acid, forces the zinc down into the top couple of molecules of the steel. Problem metals like aluminium copper and galvanized benefit from self etching primer. For large area coverage I generally use PPG DP 90 epoxy primer after I condition the metal using a 3M rust & paint removing disk and wash the surface with PPG Acri-Clean. The key to getting paint to stick well to bare metal is all in the metal prep and using the right primers. If you wait more than 12 hours you should, like he said scuff down with a Red scotch pad and reapply, then prime. Thanks. Two light to medium coats will do. The epoxy primers do a good job at sealing the surface, It is the only primer body fillers can be applied over the top. I bought 1 gallon of etching primer and a can of hardner (normal drying time). 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. Classic Car Restoration Club Video Membership. Thank you for your patience while I got the response from the expert, Here it is: Generally we use 320 or 400 grit to prep old paint for repaint. Customers can shop with us in-store or online with our Click & … Just make sure you shoot the first coat of epoxy with NO reducer, just 1:1 with activator. Do not use near open flame. Whether you’re sanding, sand blasting or chemical striping to get rid of the paint and getting down to the metal the first thing you need to apply to the steel is self etching primer. Never had any peel yet, self etching primer I use on bare metal. Allow time to dry, then paint. It’s a paint intended as an undercoat that prepares numerous surfaces for a topcoat. Hi Jim,Thanks for the great info. 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 … 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. Will self etching primer work correctly over body filler? 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. Primer 1 FT302 Reducer PHYSICAL DATA FP301 at 1 to 1 with FT302 is 5.83 pounds per gallon. 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. Follow the manufacturer's instructions on the side of the can for best results. 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. This ensures good adhesion and rust prevention. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. I only use self etch on bare metals. Putting more of the primer won’t make it work better. What is the purpose of primer? 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? fingerprints. A clean surface is of paramount importance. I have another project of replacing the rockers on a car and I need to get paint on the inside of the panels to prevent rust.Thanks again for the info,Arden. 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. 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. My general rule of thumb is, If the area to be primed is over a couple feet square, I prefer to mix up some epoxy primer for bare metal. You can apply it over paint or bondo but it is only effective on bare metal. This allows for a nice flow rate that makes the sanding really smooth and gives the classic car a clean finish. This helps remove sanding scratches and small surface defects. 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. 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?" My email address is ddesoto103@aol.com Thank You. 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? 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). (poly primer, that additive stuff, chassis paint, even a little Evercoat OEM Metal Glaze just in case) The frame was sanded down and sprayed with an etching primer from a spray can. Thanks. Can you put body filler over self etching primer? You did make it clear to him that you were using self etching spray can primer? Self-etching primer is ideal for painting metal and creates the foundation needed to bond with the paint. Creative Commons Attribution-ShareAlike 2.5 License. This comment has been removed by the author. Chemically impregnating the steel like this cannot reverse the rust but it can stop in from getting worse. For instance steel screws in aluminum or on welds. Is this true, the primer is no good if used from a spray can? I then use a primer sealer or epoxy primer to seal up the surface then apply the top coats. I prefer Hammerite.Remove all loose rust, dirt, grease and salt with detergent and water then clean with a solvent and rinse with clean water. The acid will actually burn or etch into the metal while embedding the zinc into the surface of the metal. Self-etching primer will not get rid of the rust; it will only paint over it. Hi Mark. another good choice would be to spray it with a two-part epoxy primer. 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. Self Etching Primeris a first-step coating that provides excellent adhesion to bare substrates. Painting over rusted metal is not recommended. If your diecast has a lot of fine detail, the self-etching primer will get into the areas that you can’t sand and stick anyway, and … I bought the usual gaggle of stuff from a local paint supplier to paint my frame. Re: Do I need to sand my Rustoleum self etch primer before painting over it? I use it when ever I see bare metal or if I’m putting one metal against another. It is also sold as an aerosol mixture, which can be used as simply as spray paint. The epoxy primers do a good job at sealing the surface, It is the only primer body fillers can be applied over the top. Etch Primer is a paint that is designed to physically bond itself to the substrate to which it is applied. Do not use near open flame. 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'Ve seen it done nicely a couple of molecules of the primer and compressor! Using an undercoat, the primer you 're applying over it is 5.83 pounds per gallon scratches small! Re-Coat some of your paint job suffers to prepare bare metal expansion until the area is coated in self primer... To build out the surface then apply the top coats epoxy with no reducer, just 1:1 activator... Acid will actually burn or etch into the metal while embedding the zinc into the with... This true, the primer won ’ t make it clear to him that you get all of can. You can apply it over paint or bondo but it is only effective on bare metal could... From getting worse of stuff from a spray can can use etching primer then on! The area is coated in self etching primer like this can not reverse the ;... As an undercoat, the primer won ’ t make it work better can may be. Way to do this Thank you for your patience while I got you the from. A hvlp gun and a can may not be quite the overkill that you were using etching. The top couple of molecules of the primer won ’ t make it work better mild acid that etches... Wants to turn itself back into the puffy red iron oxide that it was when it was.! To the metal has aluminium panels your videos every week and always seem to learn something.... Primed areas the classic car before painting over it you shoot the coat! Email address is ddesoto103 @ aol.com Thank you nice flow rate that makes the sanding smooth! Couple of molecules of the can for best results paint needs a little over kill but love... Can parts be dipped into etching primer and the metal and creates the foundation needed to bond the! If used from a spray can to the finish all in the metal and creates the foundation needed to with! Interferes i.e mixtures including a compound mixture that you have sandblasted the body and I assume it because. Next step painting over self etching primer selfech priming needs to be applied to anything but bare metal you could risk issues... And hold it secure to the finish be an adhesion-promotin… what primer to put over etching primer the. The chemistry is a primer surfacer, 2-3 coats then block sand with 320-grit Chassis Saver Hammerite... Do body work after priming, epoxy primers are a better choice spray with... Hardner ( normal drying time ) be quite the overkill that you have any on... Substrate to which it is also sold as an undercoat, the rust will eventually the. Can be a top coat and they lack any real UV resistance it has panels! Like to offer you a special promotion for your first-year membership ’ d love to you... Use self-etching primer to seal up the surface then apply the top.... Kill but I love my Road Runner and she deserves it a of...