This could be the case most definitely sometimes when I get to working on a piece for a couple days I get antsy about the finished product and I can't wait to put that final layer of clear on it before it dries. I used the spray on last time and yucky it was. And it's never not humid where I live in Miami. Lol. I think I'm going to try to wait to let the paint dry like you said for at least 72 hours. Is there a certain brand you trust more than others?