In the meantime, it’s important to talk to your paint dealer about the time window allowed between the primer and paint topcoat. 7 months of sitting in the sun, rain and dirt, looks like the day I … Looked perfect. 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 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. SprayMax, 2 Part (2K) Urethane Aerosol Clear Coat. Sprayed it. Cheers, JC These sprayers should have at least a 60 gallon compressed air tank in order to maintain high velocity air at regulated pressure. No sags. Betty Taylor March 2, 2009 10:53 am Can I use spar urethane on my new wood floors? He says no problem. If acrylics, which can dry in an hour or less, are applied over uncured enamels they can seal in the solvents of the enamel. Will have to experiment with it to see if I can retain full gloss. but the best way is to remove the lacquer primer . 2k primer should go over lacquer primer with NO problems. Also, if the first coats are sprayed too heavily, the urethane can invade the artwork and possibly blur any crisp, clean edges. Acrylic enamel is the more traditional option that was used on older cars. Can you paint urethane over enamel primer? This is a test of Sherwin Williams Emerald Urethane paint. 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. This way it hides imperfections. Over the last year I have torn down my 69 RS and sanded the paint down to the metal. SprayMax now offers a 2 part (2K) Urethane Aerosol Clear Coat. 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. All-purpose primers are acceptable for most applications. This primer offers excellent adhesion to bare metal and provides a proper foundation for your paint job. Thinned it with about 30 percent water to get through a number 5 tip Graco4900 HVLP. the none catalzed product moves (expands and contracts ) at a deferent rate than a catalzed product . Urethane is also better than enamel paint, since it provides a good finish and doesn't run lines. The other way around (2k urethane paint over lacquer primer) is not recommended. Lacquers have a tendency to lift enamel surfaces. Step 4. 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. I've been busy building stuff and testing out new paints. Yeah, I can get a mirror finish without the clearcoat - that is not the problem. 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. Arcylic and enamels don't. The only issue was Gloss became SG with this much thinning. 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. A polyurethane finish prevents other materials from adhering to its surface. this makes the harder outer shell more prone to chip , lift , delaminate and so on . So the lacquer paints cannot be sprayed on in a thick coat, or the product will not perform properly. No, you don't want lacquer over urethane. Please keep in mind that we are comparing the products that are 2-part in rattle cans although it is not mentioned anywhere. I got some Emerald Urethane and asked rep if I could spray directly over ASE. 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. and weather resistance than any standard aerosol clearcoat on the market today. Pros of Using Urethane Car Paint Urethane paint can be sprayed over most paints, including lacquer. It's common to do custom paint in lacquer and coat with urethane, just not the other way around. I wouldn't trust going over Rustoelum. High quality acrylic urethane paints should be sprayed with high volume, high pressure compressed air driven sprayers. 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. Self-etching primers have to have another primer over the top of them or the paint won’t adhere. The solvent used to thin enamel is called reducer, as it reduces the viscosity. 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. Can urethane be sprayed over enamel? Can I spray urethane clear over acrylic enamel? 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. The 1:1 mix ratio makes it easy to mix (one part primer to one part catalyst). then, apply a medium to heavy coat, and finally a heavy coat. Then about 300 little pimples presented on each face of door. They are urethane, enamel, and epoxy. It’s at least almost always worth a try. That means it is sprayed over the top of epoxy primer and can be sanded down. First time I used it was over All Surface Enamel on a door (w/2 coats Bin). If you're going to airbrush, go to an paint supplier for auto body shops and they'll mix up some urethane. If it's not, shoot it with another coat of clear urethane. is there a jell coat on your fiberglass bumper? Reply. 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. Lacquer paints dry to a hard shell, leaving a very thin paint film. as a BASF rep the answer is yes and no . 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. The intent is you spray a coat on, sand it down, spray a coat on, sand it down. We have compiled the most frequently asked questions about automotive undercoats. It all began this morning after getting a nice mirror finish on a panel last night. Oil based paint and they 'll mix up some urethane that 's not, shoot it about! Primer, but is meant to go under enamal topcoats paint urethane paint dries off ;! 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