Hmm, on my first build I think I did 4 coats then wetsanded, then another 4, and wetsanded again. o well. I'll forgo wetsanding until the final coat is sprayed. Maybe I should do more than 20 coats, maybe 25?
Stew Mac says the lacquer needs only a week to cure, however I plan on waiting 2 weeks before wetsanding and buffing. Maybe longer if I can find the patience. I suppose I could work on another guitar in the meantime.