Maybe it's just me but it seems that most rattle can clear coats are poor quality.
I mean i refinished my les paul copy with rattle can paint and the clear doesn't seems to harden very much. It been 2 a half months and i could dig my nail through it pretty easily. The brand was Motomaster (sold at Canadian Tire, here in Canada). I know that is was quite hot during this summer and the humidity was high too, which did not help probably.
I want to refinish the Charvel i've just bought 1 week ago, but i'm scared to get the same result. I did a test with Duplicolor rattle can clear coat. After 1 full day of drying, it is still a bit soft. it appears to be a little bit harder than the motomaster but still not satisfying.
I have absolutely no ideas of what i did wrong. i mean, i used rattle cans a lot in the past but never used clear coat and i never had some sort of problems.
i think i'll try Varathane spray can varnish, i used it over a solid color on my homemade footswitch and it turned out quite well(but is it a good idea to use this on a guitar body?) .
Otherwise i guess i'll try to get some REAL automotive clear.