I wouldn't trust going over Rustoelum. is there a jell coat on your fiberglass bumper? It’s at least almost always worth a try. No sags. If it's not, shoot it with another coat of clear urethane. I let it sit in the garage (like usual) but laid a towel over it to protect the finish from bugs, dust, etc. With a proper primer, urethane paint can last for years. Can I spray urethane clear over acrylic enamel? Although urethane does offer the best finish, is industry standard, easier to apply, dries quicker and provides better coverage, it is more labour intensive than acrylic enamel. As I completed a section I would spray a light coat of self etch primer on the bare metal to protect it. SO YES it can be doen . Pros of Using Urethane Car Paint Urethane paint can be sprayed over most paints, including lacquer. Live Q&A - Can Enamel Paint be applied over lacquer paint? It's a different material and will very likely peel in a few years or less. Can Enamels be used over lacquers? but the best way is to remove the lacquer primer . Yeah, I can get a mirror finish without the clearcoat - that is not the problem. Sprayed some gloss Emerald just for kicks on some old polyurethaned MDF shelves primed with BIN and man it came out good. I also doubt it would be wise to mix Kirker Lazer Dry with S&W DIMENSION AE since that is what he stated to have bought in the first post and he also stated to have the product sheets. The only issue was Gloss became SG with this much thinning. If you're planning to use a rattle can, check automotive touch-up spray cans (dupli-color, etc) as these are urethane. Enamel primer is the same as urethane primer, but is meant to go under enamal topcoats. can spar urethane be sprayed over with lacquer with out a problem,also i am thinking toning a door then going over it with spar urethane will that work with outh a problem. Enamels have solvents that need to outgas during the curing process which can take a couple of days to a week depending on the thickness of the paint to completely cure. After a series of experiments I discovered the 'enamel problem' happened when applied to epoxies containing nonyl phenol (most epoxies do - our Premium No Blush epoxy does not). Can urethane be sprayed over enamel? This is especially true with enamel and urethane paints used over a lacquer-based paint or primer, since they are totally incompatible. then, apply a medium to heavy coat, and finally a heavy coat. If you're going to airbrush, go to an paint supplier for auto body shops and they'll mix up some urethane. Be sure to follow me on Instagram https://www.instagram.com/caraddictgarage/ for quick updates. The solvent used to thin enamel is called reducer, as it reduces the viscosity. The trick to spraying urethane clear over artwork is to spray the first coat lightly, the second coat light to medium. Finish was defect free but client didn't like. Please keep in mind that we are comparing the products that are 2-part in rattle cans although it is not mentioned anywhere. Can you spray over lacquer? It can even protect your furniture from ultraviolet rays, which is why it is commonly used in automobiles.Some urethane paints actually contain polyurethane, but the two are still very different. No, you don't want lacquer over urethane. I believe that Urethane paints are not allowed to be sprayed without a license in California. Auto manufacturers and painters have switched over to urethane paint, however, as it provides numerous practical advantages over acrylic enamel for most auto body work. Sprayed it. Can Lacquers be used over enamels? SprayMax, 2 Part (2K) Urethane Aerosol Clear Coat. Yes. ... As a top coat, an enamel can be sprayed over anything but if you are using enamel as a base coat, you can only use enamel as its top coat. and weather resistance than any standard aerosol clearcoat on the market today. Many brands and types of marine paints are available which are suitable for roller or brush application by the amateur. This is a test of Sherwin Williams Emerald Urethane paint. It can’t be an epoxy primer, but it can be a urethane primer. Acrylic enamel is the more traditional option that was used on older cars. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. #7 We have compiled the most frequently asked questions about automotive undercoats. Can you paint urethane over enamel primer? Apart from this, urethane paint dries off quickly; it's resistant to chipping and doesn't fade easily. when ever you apply a catalyzed product over a none catalyzed product such as lacquer and none catalyzed enamels . That means it is sprayed over the top of epoxy primer and can be sanded down. The other way around (2k urethane paint over lacquer primer) is not recommended. You’ll have to prime, sand and use oil-based paint in order for your paint to stick to the finish of your wooden furniture. I've been busy building stuff and testing out new paints. You didn't say if the urethane is clear. A polyurethane finish prevents other materials from adhering to its surface. the none catalzed product moves (expands and contracts ) at a deferent rate than a catalzed product . Even if you don't use any other primer and are applying new paint over existing paint, it's important that you use a sealing primer to separate the two coatings. It is usually not waterproof, so it is not a good topcoat. Although latex paint dries to the touch in a few hours, it can take up to 30 days to cure, depending on the color and thickness of the coating and the ambient temperature and humidity. He says no problem. The 1:1 mix ratio makes it easy to mix (one part primer to one part catalyst). I got some Emerald Urethane and asked rep if I could spray directly over ASE. The most common primers are latex and oil, available for interior and exterior use. I am not an authority on paint and I would never claim to be, but I shot a 2 part Urethane clear coat over Rustoleum enamel on the roof of my 49 without issue. Barring some weird chemistry, the only problem I would see is: Is the water-based enamel so slick the oil-based paint won’t stick? If I apply urethane paint over the enamel, ... spar urethane can be used over a water sealer. Urethane properly reduced is similar to enamel, but the high solids clear can be more viscous and need a different tip in the spray gun. Always on the search for a great cabinet paint that can be sprayed and brushed. Lacquer paints dry to a hard shell, leaving a very thin paint film. SprayMax now offers a 2 part (2K) Urethane Aerosol Clear Coat. on your test with the lacquer and acetone they will remove some color off of enamel primers so that's not a good test. Reply. 7 months of sitting in the sun, rain and dirt, looks like the day I … If acrylics, which can dry in an hour or less, are applied over uncured enamels they can seal in the solvents of the enamel. This way it hides imperfections. Dupli-Color® enamels can be sprayed over lacquer substrates, or any other painted surface that has been sanded smooth and clean of dirt, grease, and dust. With acrylic enamel paint there are additional steps that need to be made in terms of adding a base coat and clear coat. Self-etching primers have to have another primer over the top of them or the paint won’t adhere. This 2k urethane Clear Coat spray has a much higher U.V. In fact I shot it over the old paint and rattle can primer spots without issue. Linear polyurethane (LP) systems can usually be applied directly over epoxy coated surfaces without primers, but they are costly and frequently have much more critical application parameters. The intent is you spray a coat on, sand it down, spray a coat on, sand it down. you can clear coat over acrylic enamel but no not for 24 hours and then and only then if you wet sand it 1st with a untra fine sand paper . Some are a few hours; others allow several days. I haven't posted in a very long time. Will have to experiment with it to see if I can retain full gloss. Types. It's important to wait for the latex paint to fully cure before you coat it with polyurethane, or the latex undercoat may not harden fully. Lacquers have a tendency to lift enamel surfaces. Painting over polyurethane requires patience, time, and effort. Then about 300 little pimples presented on each face of door. Except for smell, alkyd and acrylic enamels sprayed the same to me. All-purpose primers are acceptable for most applications. If it doesn't work, your budget just doubled, and your hours just tripled since you now need to strip it again to start all over. as a BASF rep the answer is yes and no . First time I used it was over All Surface Enamel on a door (w/2 coats Bin). This primer offers excellent adhesion to bare metal and provides a proper foundation for your paint job. Use urethane paint, it forms a chemical bond with epoxy. High quality acrylic urethane paints should be sprayed with high volume, high pressure compressed air driven sprayers. You can generally paint any oil based paint over any water based paint. Urethane and acrylic enamel paints are most commonly used for auto body finishes. Urethane is also better than enamel paint, since it provides a good finish and doesn't run lines. In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. Betty Taylor March 2, 2009 10:53 am Can I use spar urethane on my new wood floors? Step 4. These sprayers should have at least a 60 gallon compressed air tank in order to maintain high velocity air at regulated pressure. So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. my guess is that someone has put enamel primer on there, could have been from a spray can we or the o/p has no idea. Frequently asked questions about urethane primers Automotive undercoats, primers, sealer and body shop supplies available to order online. Looked perfect. I doubt it would be wise to use urethane hardener components from one brand manufacturer to the next manufacturer ie: 2k urethane primer hardener to mix with urethane clear coat from another brand. The enamel dried fine over the spar varnish but not over the epoxy were it stayed tacky for days and days, until I dragged the boat out into the hot summer sun for several days. They are urethane, enamel, and epoxy. Arcylic and enamels don't. if you do so with a metallic color you will sand off some of the metallics . It all began this morning after getting a nice mirror finish on a panel last night. Cheers, JC this makes the harder outer shell more prone to chip , lift , delaminate and so on . 611 Posts #7 • Mar 14, 2011. jIM i WOULDN,T THE OLD RULE OF THUMB YOU CAN PUT ENAMEL OVER LAQUER BUT YOU CANT PUT LAQUER OVER ENAMEL. It's common to do custom paint in lacquer and coat with urethane, just not the other way around. Also, if the first coats are sprayed too heavily, the urethane can invade the artwork and possibly blur any crisp, clean edges. With Eastwood’s Single-Stage Urethane system, apply Eastwood Epoxy Primer over bare metal. The pen is there so the camera could focus on something. 2k primer should go over lacquer primer with NO problems. Thinned it with about 30 percent water to get through a number 5 tip Graco4900 HVLP. 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