The intent is you spray a coat on, sand it down, spray a coat on, sand it down. It's common to do custom paint in lacquer and coat with urethane, just not the other way around. 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. Apart from this, urethane paint dries off quickly; it's resistant to chipping and doesn't fade easily. Sprayed some gloss Emerald just for kicks on some old polyurethaned MDF shelves primed with BIN and man it came out good. Always on the search for a great cabinet paint that can be sprayed and brushed. Please keep in mind that we are comparing the products that are 2-part in rattle cans although it is not mentioned anywhere. 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 . Reply. 2k primer should go over lacquer primer with NO problems. 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. 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. Use urethane paint, it forms a chemical bond with epoxy. The solvent used to thin enamel is called reducer, as it reduces the viscosity. You didn't say if the urethane is clear. 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? 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 Enamels be used over lacquers? 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. With Eastwood’s Single-Stage Urethane system, apply Eastwood Epoxy Primer over bare metal. Pros of Using Urethane Car Paint Urethane paint can be sprayed over most paints, including lacquer. 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. High quality acrylic urethane paints should be sprayed with high volume, high pressure compressed air driven sprayers. Except for smell, alkyd and acrylic enamels sprayed the same to me. 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. If it's not, shoot it with another coat of clear urethane. This 2k urethane Clear Coat spray has a much higher U.V. We have compiled the most frequently asked questions about automotive undercoats. Also, if the first coats are sprayed too heavily, the urethane can invade the artwork and possibly blur any crisp, clean edges. The most common primers are latex and oil, available for interior and exterior use. No, you don't want lacquer over urethane. With a proper primer, urethane paint can last for years. Types. All-purpose primers are acceptable for most applications. These sprayers should have at least a 60 gallon compressed air tank in order to maintain high velocity air at regulated pressure. Frequently asked questions about urethane primers Automotive undercoats, primers, sealer and body shop supplies available to order online. Looked perfect. If I apply urethane paint over the enamel, ... spar urethane can be used over a water sealer. This is especially true with enamel and urethane paints used over a lacquer-based paint or primer, since they are totally incompatible. It's a different material and will very likely peel in a few years or less. Will have to experiment with it to see if I can retain full gloss. In fact I shot it over the old paint and rattle can primer spots without issue. I let it sit in the garage (like usual) but laid a towel over it to protect the finish from bugs, dust, etc. Can you paint urethane over enamel primer? Can Lacquers be used over enamels? Finish was defect free but client didn't like. if you do so with a metallic color you will sand off some of the metallics . Self-etching primers have to have another primer over the top of them or the paint won’t adhere. Cheers, JC The 1:1 mix ratio makes it easy to mix (one part primer to one part catalyst). It’s at least almost always worth a try. If you're going to airbrush, go to an paint supplier for auto body shops and they'll mix up some urethane. 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. The pen is there so the camera could focus on something. and weather resistance than any standard aerosol clearcoat on the market today. Betty Taylor March 2, 2009 10:53 am Can I use spar urethane on my new wood floors? Enamel primer is the same as urethane primer, but is meant to go under enamal topcoats. Acrylic enamel is the more traditional option that was used on older cars. The only issue was Gloss became SG with this much thinning. I wouldn't trust going over Rustoelum. then, apply a medium to heavy coat, and finally a heavy coat. This primer offers excellent adhesion to bare metal and provides a proper foundation for your paint job. Yes. You can generally paint any oil based paint over any water based paint. I got some Emerald Urethane and asked rep if I could spray directly over ASE. So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. 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. This way it hides imperfections. No sags. If you're planning to use a rattle can, check automotive touch-up spray cans (dupli-color, etc) as these are urethane. 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 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. Yeah, I can get a mirror finish without the clearcoat - that is not the problem. 7 months of sitting in the sun, rain and dirt, looks like the day I … With acrylic enamel paint there are additional steps that need to be made in terms of adding a base coat and clear coat. Live Q&A - Can Enamel Paint be applied over lacquer paint? Some are a few hours; others allow several days. Step 4. Many brands and types of marine paints are available which are suitable for roller or brush application by the amateur. He says no problem. This is a test of Sherwin Williams Emerald Urethane paint. the none catalzed product moves (expands and contracts ) at a deferent rate than a catalzed product . I believe that Urethane paints are not allowed to be sprayed without a license in California. It is usually not waterproof, so it is not a good topcoat. 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. Urethane and acrylic enamel paints are most commonly used for auto body finishes. Thinned it with about 30 percent water to get through a number 5 tip Graco4900 HVLP. but the best way is to remove the lacquer primer . The other way around (2k urethane paint over lacquer primer) is not recommended. SO YES it can be doen . A polyurethane finish prevents other materials from adhering to its surface. Can I spray urethane clear over acrylic enamel? I haven't posted in a very long time. Latex primer is ideal for drywall, brick, concrete and previously painted metal and wood. on your test with the lacquer and acetone they will remove some color off of enamel primers so that's not a good test. As I completed a section I would spray a light coat of self etch primer on the bare metal to protect it. 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. 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. Lacquer paints dry to a hard shell, leaving a very thin paint film. 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. SprayMax now offers a 2 part (2K) Urethane Aerosol Clear Coat. In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. First time I used it was over All Surface Enamel on a door (w/2 coats Bin). SprayMax, 2 Part (2K) Urethane Aerosol Clear Coat. Lacquers have a tendency to lift enamel surfaces. Sprayed it. 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. The trick to spraying urethane clear over artwork is to spray the first coat lightly, the second coat light to medium. 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. #7 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. Arcylic and enamels don't. 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. I've been busy building stuff and testing out new paints. is there a jell coat on your fiberglass bumper? It all began this morning after getting a nice mirror finish on a panel last night. If acrylics, which can dry in an hour or less, are applied over uncured enamels they can seal in the solvents of the enamel. 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. ... 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. as a BASF rep the answer is yes and no . Painting over polyurethane requires patience, time, and effort. Be sure to follow me on Instagram https://www.instagram.com/caraddictgarage/ for quick updates. It can’t be an epoxy primer, but it can be a urethane primer. Can you spray over lacquer? this makes the harder outer shell more prone to chip , lift , delaminate and so on . 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. 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