I used the Rustoleum 2X clear on my JK-1, and it definitely took longer to cure. After hanging for about a month, it was still a little soft and gummy. It was enough to worry me because it should have been cured by then. I checked on it about a week later, though, and all was good. There are some not-so-great areas on the guitar, but that was more my fault and inexperience than the clearcoat. I've seen some disaster stories about mixing and matching types of paint and even brands, which is the main reason I went with the Rustoleum, because they made the type of paint I wanted. I'd be hesitant to mix and match, though.