whats the optimum temp,always thought it was cold pannels that were a pain,no expert by the way done a few of my own bits with 2k in a can and used a halogen heater and they always come out with a nice shine ,used 1500 grit on the top coat then laquered but 2000 grit would be better,learning every day off this site,also do you flatten the primer,I always have but not sure if your ment to,