ORIGINAL: NJRCFLYER2
The secret to preventing chalk-key-ness is to wax it when its young.
Good point. How long to wait after finishing before you can wax it?
Basically, after finishing I stuff the airplane and than wax. Sometimes the stuffing takes months because I've lost interest, other times its a week or two. I have found the (new) Hi Tech - polymer - waxes to be very good at UV protection. Sorry for the pathetic answer, I really haven't kept track. However, I always wax before flying for the first time.
Klass Kote seems to gas off fairly quickly, days instead of the weeks it takes - lacquer - dope to gas off.
Disclosure: I do not consider myself an expert painter. 7 foot finish and I'm fine. To me the trick is to have a 7 foot - light - finish when the airplane is a couple season's old.