I find automotive paint without the benefit of dryers, takes an incredibly long time to dry, like months, even years to properly cure. Even after 3 weeks sometimes I have started handling it and next thing you find yourself leaving fingerprints or getting paint on your fingers. A lot depends on the weather too and this horrible cloudy, drizzly, cold weather we are getting lately is definitely not ideal painting weather. I've resorted to doing a few small items inside an enclosure where it is not quite as damp, but still having problems. Will just have to wait until warmer weather. Another reason why I dislike painting so much. It is too finicky.