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How should the first coat of automotive urethane clear coat be sprayed?
I'm using PPG urethane clear coat. Most instructions and videos online say to mist a light first coat for adhesion ("tack coat"). The first coat will not appear glossy. Its purpose is to penetrate into the base coat for better adhesion and flexibility. Subsequent coats can be wet and achieve high gloss. But the guy from the paint supply store says the first coat should be a wet coat that looks the way you want the finished product to look. His explanation is, "People are used to spraying lacquer, in which each coat melts into the previous coat and levels out. Urethane is prone to orange peel if you use a light 1st coat because each coat doesn't melt into previous coats."
I've painted 3 times in the last week using wet 1st coats as the guy at the paint store suggested and they look great, but I'm afraid of the long term effects.
4 Answers
- wildmanny2Lv 71 decade agoFavorite Answer
As a professional painter I can say that whatever method is used to apply clearcoat, the goal is to produce the best finish.What works for you is what is best.And the long term durability is not affected by starting with any particular first coat.Find a technique that suits you and be happy.
- Anonymous5 years ago
You can just don't put a have coat on all at once. put a light coat about 4 times. You have to use enamel, its hard to get lacquer and in some states illegal.if you have enamel base coat use the enamel clear. depends on the look you want you can let it dry for 20 min than spray the clear for a wet look or wait a day or two and spray the clear. or you can go buy a quart of clear and mix it with the base coat and spray it at once.
- StephenLv 61 decade ago
A light coat is always recommended when spraying with clear coat or urethane. Isn't that what the manufacturer suggests? Lacquer is a different animal and the spray technique is different than clear coat. Are you going to have problems later on with your paint job running afoul, you will be lucky if you don't experience anyway, after it is out in the sun for awhile.
