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If you have used lacquer, and seen how easily it is softened or stained, you will understand why it needed wax.
Urethane is very tight celled, and will resist gas, lacquer thinner, and other harsh chemicals, long after the lacquer is ruined.....and that is without wax, which also would have been washed off by these chemicals.
I use R-M DC92 Diamont Clear. It's a catalyzed acrylic urethane, that has been around for about 10 years or more, so it's a proven product. We live in the ultraviolet capital of the world, and I have not had a single failure from sun exposure.
The only urethane job that did fail on me was a Sherwin Williams single stage job. It started "chalking out" in a year or two, even though it received regular waxing. Sherwin-Williams is R-M's cheaper line of paint. Obviously I don't use S-W any more, since I guarantee my work as long as you own it.
Not disputing anyone's opinion....just sharing actual experiences.
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Great responses here for clear coat care, thanks guys, but I have a slightly diff problem, have a large spot on the bedside bout the size of a floormat.It started "chalking out. How and what can be done here short of a complete repaint?
