i flat sanded it this morning and did 2 more coats today. solvent pop? this is a 2 part system, it has a hardener and a base, its like an epoxy, no solvent popping, because it doesn't disolve anything to dry. btw, it flat sanded like a dream, didn't even get much of the annoying buildup on the sandpaper that you have to scrape off, it was great. i also have to hold off on it for a while because the guy is out of town, and he hasn't shipped me the pickup yet, so it won't be going out the door for a couple of weeks.