I spray just now 3-4pm, don't think it rained. I sprayed on another batch of bare plastic but don't have cracking issue, only happens when there's already painted.
i can understand mixture may be different but still cracking so much something must have gone wrong. because i have done even wetter coats on coats before and i get glossy finish not cracks.
anyway any good cheap way to remove the cracked paints? mr.thinner too expensive to use like this, normal thinner also difficult to wipe and damages the plastic. do lighter fluid work?
PS. The Crack happened on both cans in different situation:
1.3 parts cracked after spraying the lacquer on acrylic coat, rest same method but no crack.
2.cracked after spraying a new can of same brand/type after previous coat.
I then tried mist coat from very far, i guess it's not thick enough to do damage, but i kept quite a distance and the coat wasn't that thick for those cracked. And strange part is some crack some don't and seems the shape of the parts have consistency either that or the paint changed it's characteristic in between.
I use my china brand thinner but you can try general purpose thinner and use brush to brush the coat off with general purpose thinner stroke by stroke.