Jadnashua
Retired Defense Industry Engineer xxx
What you saw in the roller pan is the result of getting too thick of a coating, and where the wet film thickness gauge can help. Coats no thicker than specified, and no more total thickness than specified does not crack and split like that which, I think, is caused by uneven drying and the resulting shrinkage. The thinner coats allow the liquid carrier to evaporate without issue.