I'm repainting my tank and have given up on trying to use expensive paint, so I'm using rustoleum enamel engine paint. I sanded down, redid the primer and color coat and everything looked great, no problems at all. Things went to hell when I tried to put on the clear coat, twice now I've tried to put the clear on and twice it's wrinkled up in several places. I'm using all rustoleum engine enamel, so everything should be compatible. I let the color coat dry for a week despite the instructions on the can saying I can repaint after 24 hours. Both times I used 2000 grit on the color and wiped it all down really well to make sure there were no contaminates on the tank, and like I said both times now the paint's wrinkled after drying. I'm doing it down in the basement, it's cool but the can says above 50F is ok and even so, should the coolness just extend the drying time, not cause wrinkles? Any other suggestions, I cannot figure out what I'm doing wrong.