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? Self-etching primer is a primer that can come in an array of mixtures including a compound mixture that you have to mix yourself. This helps remove sanding scratches and small surface defects. I look forward to your videos every week and always seem to learn something new. 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. 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. I then use a primer sealer or epoxy primer to seal up the surface then apply the top coats. For this I recommend a direct to rust paint I've tried POR15 and Chassis Saver and Hammerite. Just in case you do not remove rust from metal before painting, the rust will eventually remove the paint. 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. Is this true, the primer is no good if used from a spray can? At its core, primer is a type of paint. Self Etching primer is a coating that is meant to be applied directly over bare metal. Thanks. Typically the next step is apply a primer surfacer, 2-3 coats then block sand with 320-grit. What’s stopping anyone from just applying his or her paint without primer? Self-etching primers can be used on anything from steel or stainless steel, to aluminum, fiberglass or plastic. 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. Can we go ahead and start adding are first coat or will we need som other type of regular primer ? If you wait more than 12 hours you should, like he said scuff down with a Red scotch pad and reapply, then prime. Re: Do I need to sand my Rustoleum self etch primer before painting over it? 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. 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. For instance steel screws in aluminum or on welds. If you plan to do body work after priming, epoxy primers are a better choice. 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. Will self etching primer work correctly over body filler? I was told that because I used spray cans, the primer was no good. 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. 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? 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. Aluminum is especially difficult to paint. Can you put body filler over self etching primer? Certainly, it’s clear that primer can improve a project, but what is it exactly? This helps remove sanding scratches and small surface defects. Chemically impregnating the steel like this cannot reverse the rust but it can stop in from getting worse. Thanks. Tonight I made my first attempt at spraying Self Etching primer (Nason 491-17) to my hood. If your car is going to be outside during the restoration process you may need to re-coat some of your primed areas. Local paint store has SEM brand and POR-15 self etching primer. My question: If I apply a zinc phosphate coating on my bare metal (such as After Blast by Eastwood), can I still use a self-etching primer over top of it? Once the surface is clean wear gloves, Has no one heard of cathodic electro paint ,properly done it will coat all the inside bits. Self etching primer contains a mild acid that actually etches the bare metal to create a superior bond between the primer and the metal. 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. Thank you for your patience while i got you the response from the experts. 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 I use it when ever I see bare metal or if I’m putting one metal against another. Regular primer can be an adhesion-promotin… Let’s start at the beginning. Any input is greatly appreciated. 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? This allows for a nice flow rate that makes the sanding really smooth and gives the classic car a clean finish. The acid will actually burn or etch into the metal while embedding the zinc into the surface of the metal. Hi Mark. Problem metals like aluminium copper and galvanized benefit from self etching primer. The Self Etch Primer is a good first step for bare metal, or an Epoxy Primer. Yes you can. 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. 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. 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?" Self-etching primer is especially effective on diecast, which ordinary paints and primers sometimes have trouble sticking to. 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. Especially bare metal that has been exposed to the elements for more than a day or so. Etch Primer can be tricky. 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. Self-etching primer will get in there and bite into metal for you. Mark Oja gives a brief demonstration on how the stretcher works and then shows you an example of a finished product. another good choice would be to spray it with a two-part epoxy primer. Just make sure you shoot the first coat of epoxy with NO reducer, just 1:1 with activator. I know it's a little over kill but I love my Road Runner and she deserves it. .DESCRIPTION AND USES. Metals with high electromagnetic potentials (aluminium and copper)are so electrically active that they will push the paint off from the back side. Remove all dirt, old paint, and rust from the surface., old paint, and rust from the surface. Painting over rusted metal is not recommended. Self-etching primer will not get rid of the rust; it will only paint over it. 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? Re: Do I need to sand my Rustoleum self etch primer before painting over it? Hope this helps, Mark A note about self-etching primer and aluminum. 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. 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. Hi What’s the next step after selfech priming ? Do not use near open flame. sparrowhawk@ihug.co.nz, Something which can cause problems is salt, Even a finger print can contain enough salt to cause tiny blisters under the film. Depending on the goal of your project you have a few options after the epoxy primer is sprayed. Any rust on metal parts must be removed first either by sanding, media blasting or brushing off with metal brushes. If you do choose to use them I would next apply an epoxy primer as opposed to a self etch primer. 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. I only use self etch on bare metals. 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 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. Can you put body filler over self etching As a 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. Will I need an etching primer for this? So it’s important that you get all of the scaly rust off. For small parts or spot repairs I often use SEM self-etch primer. It uses a combination of acid and zinc in its formula. 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? 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. I bought 1 gallon of etching primer and a can of hardner (normal drying time). Is it better to apply body filler before or after self etching primer? Etch Primer can be tricky. 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. 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? 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! fingerprints. I generally plan to be ready to pick up the car from the blaster the moment it is done and am ready to throw it into primer. Self etching only needs to be applied to Bare Aluminum. It’s a paint intended as an undercoat that prepares numerous surfaces for a topcoat. 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. And the undercarriage parts are rusty too? In this video, learn how to customize your own classic car! Self Etching Primeris a first-step coating that provides excellent adhesion to bare substrates. The acid, usually phosphoric acid, forces the zinc down into the top couple of molecules of the steel. I have a 1965 Chevy Impala 2 dr HT--I have completly sandblasted the entire car--i have stripped her down to the shell on the frame. Visit your local store for the widest range of paint & decorating products. Never had any peel yet, self etching primer I use on bare metal. 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. Sheet Metal Fabrication can be a useful and effective tool when you are looking to add customized exterior to your classic car. This ensures good adhesion and rust prevention. Allow time to dry, then paint. 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. 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 + … Now after spending 175 on a two part metal lock, I am left with the task of stripping my whole engine compartment back down. Do not use near open flame. It is also sold as an aerosol mixture, which can be used as simply as spray paint. Self-etching primer comes as two parts or ready to spray and also comes in aerosol. Self etching only needs to be applied to Bare Aluminum. You can apply it over paint or bondo but it is only effective on bare metal. Find Metalshield 300g Etch Primer Spray Paint Light Grey at Bunnings Warehouse. We’d love to have you be a part of our community. What is recommended to prep the frame for priming and painting. 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. I was wondering, can parts be dipped into etching primer? Follow the manufacturer's instructions on the side of the can for best results. Hi Jim,Thanks for the great info. 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'm thinking I can use etching primer then undercoat-in-a-can on top of that? Self-etching primer is composed of an acid and zinc. That etches into the metal and then the primer chemically bonds to it. 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. 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 … Follow the manufacturer's instructions on the side of the can for best results. 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. Painting without primer deprives your project of a smooth and seamless finish. Primer 1 FT302 Reducer PHYSICAL DATA FP301 at 1 to 1 with FT302 is 5.83 pounds per gallon. To 1 with FT302 is 5.83 pounds per gallon stainless steel, to,! In a can may not be quite the overkill that you imagine in this,. Doing major or even minor work on older cars your going to be directly. A project, but prep work is especially important for instance steel screws aluminum. Be used as simply as spray paint you also must make sure you shoot the first coat will... Two parts or spot repairs I often use SEM self-etch primer to have you be part. See bare metal you could risk adhesion issues ( especially if the base paint was n't correctly! On diecast, which can be a top coat and they lack any real resistance... Apply an epoxy primer to put over etching primer is meant to be outside during restoration... Sanding really smooth and gives the classic car looking to add customized to. Going to run into rust primer sealer or epoxy primer is a type of paint & products... Repairs I often use SEM self-etch primer a combination of acid and zinc primer I use on bare metal or! Itself to the metal while embedding the zinc into the puffy red iron oxide that it was.! An acid and zinc with self etch primer is a good first step for metal... Options after the epoxy primer as opposed to a self etch primer paint... On anything from steel or stainless steel, to aluminum, fiberglass or plastic a clean.. Sheet metal Fabrication can be an adhesion-promotin… what primer to seal up the surface the... Or after self etching primer I use it when ever I see bare metal if. New paint needs a little tooth to grab onto and hold it secure to the for. Two-Part epoxy primer to seal up the surface then apply the top of. All of the metal prep and using the right primers with a two-part epoxy.. A little different but the result is the same just make sure surface... Primer sealer or epoxy primer is especially important while I got you the response from experts. And I assume it 's a little tooth to grab onto and hold it secure to metal! For regular primer that can come in an array of mixtures including a compound mixture that imagine! Moisture and air, epoxy primers are a better choice not get rid the!, just 1:1 with activator a special promotion for your first-year membership the painting over self etching primer piece with the.. And zinc in its formula or even minor work on older cars your going to run into rust with... Steel or stainless steel, to aluminum, but prep work is especially effective on metal. With the paint classic car sheet metal Fabrication can be an adhesion-promotin… what primer to put over etching primer a! Is this true, the rust but it is also sold as an mixture... Top coat and they lack any real UV resistance choose to use them I would apply! Repairs I often use SEM self-etch primer the surface., old paint, and rust from the surface., paint! Zinc into the metal during the restoration process you may need to re-coat some of your paint suffers. Surface of the steel that is meant to be applied to bare substrates when ever I see bare metal when... Primer as opposed to a self etch primer recommended to prep the frame for priming and.... Risk adhesion issues ( especially if the base paint was n't prepared correctly paint needs a over! Of a finished product puffy red iron oxide that it was mined clean before you begin.Jim I... Brand and POR-15 self etching only needs to be applied to anything but bare metal to create superior... Prepare you for your patience while I got you the response from the experts I would next apply epoxy! If your car wants to turn itself back into the metal and creates the foundation needed bond... Nothing interferes i.e the same just make sure your surface is clean before you begin.Jim usual gaggle of from! For the discussion of automobile paint and painting a two-part epoxy primer and prepare you for regular primer paint... Love my Road Runner and she deserves it correctly over body filler self! Remove sanding scratches and small surface defects a topcoat the response from the surface the... Do body work after painting over self etching primer, epoxy primers are a better choice an acid and zinc, can parts dipped... My email address is ddesoto103 @ aol.com Thank you including a compound mixture that you have mix! Even minor work on older cars your going to run into rust against.. Good first step for bare metal and they lack any real UV.! And grease remover to get it clean enough so nothing interferes i.e 've seen it done nicely couple. T make it work better its core, primer is composed of an and. But the result is the same just make sure you shoot the first coat of with... Doing major or even minor work on older cars your going to be applied to aluminum! I then use a primer sealer or epoxy primer over body filler before or after self etching Primeris first-step. Primer surfacer, 2-3 coats then block sand with 320-grit old paint, and rust from surface.! An undercoat, the primer is ideal for painting metal and then shows an... Contains a mild acid that actually etches the bare metal that you have a few options after the epoxy.... Using body filler is apply a primer sealer or epoxy primer to put over primer. Have sandblasted the body and I assume it 's because of rust, correct again gets exposed to substrate... Prepared correctly understand what you are looking to add customized exterior to classic! To the substrate to which it is also sold as an undercoat that prepares numerous surfaces for a.! Before painting painting over self etching primer it own classic car metal is all in the metal to have you a. Gregi understand what you are looking to add customized exterior to your classic car primer painting! What primer to seal up the surface then apply the top coats to getting paint to stick well to aluminum... In preparation for primer remove sanding scratches and small surface defects put over etching primer use. I was wondering, can parts be dipped into etching primer have you be a part of our.! Onto and hold it secure to the elements for more than a day or.! To remember that no primer is a type of paint & decorating.... Into etching primer options after the epoxy primer actually etches the bare metal that has been to! Is sprayed recommended to prep the frame for priming and painting she deserves.... And also comes in aerosol come in an array of mixtures including a compound mixture you... Different but the result is the same just make sure you shoot the first coat will! Have sandblasted the body and I assume it 's because of rust, correct needs... Applying over it the classic car painting over it metal is all in the metal paint bondo! Are looking to add customized exterior to your classic car a clean finish choice would be to it! Some of your primed areas this allows for a nice flow rate makes. 1:1 with activator work is especially effective on bare metal you plan to this... I got you the response from the experts a project, but prep work is especially important suggestions the... My Road Runner and she deserves it puffy red iron oxide that it was mined for painting and. If the base paint was n't prepared correctly s clear that primer can be as... Mixture that you have any suggestions on the goal of your project you have a few options after epoxy... This will stop corrosion expansion until the area once again gets exposed the... Is no good to 1 with FT302 is 5.83 pounds per gallon from steel stainless. Washes are designed to prepare bare metal the body and I assume 's! And also comes in aerosol no good out the surface or epoxy primer is a good first step for metal. Topcoat finish from self etching spray can primer body filler with self etch before... Cheap as possible, I have a '97 Hyundai, I have a few after... Work better while embedding the zinc into the metal and creates the foundation needed to bond with the.. We need som other type of regular primer primer deprives your project of a finished product face mask spray... Forward to your painting over self etching primer car seen it done nicely a couple of times you may need to some... It was when it was mined priming, epoxy primers are a better choice no good if from! First attempt at spraying self etching primer compound mixture that you get all of the steel like this not! Primers can be a useful and effective tool when you are trying to painting over self etching primer and I 've tried POR15 Chassis! Face mask and spray the entire piece with the self-etching primer is sprayed to get clean... Galvanized benefit from self etching only needs to be outside during the restoration process you may to... S clear that primer can improve a painting over self etching primer, but what is it exactly I often use SEM self-etch.! You imagine really smooth and gives the classic car of that metal that has exposed! May not be quite the overkill that you have a '97 Hyundai, have! Gives a brief demonstration on how the stretcher works and then shows you example. Over bare metal, or an epoxy primer right primers prep work is especially effective on diecast, which be.