Nice job mark, I paint cars for my living. For solid colors like yours ..I have been using dupont Fulthane. It is a single stage urethane that lays out like glass and buffs like butter. It holds a gloss and will not chalk up like an enamel. It does not work as well if mettalic, the flakes don't want to lay evenly. BTW I use a generic 2k primer that is only $65 a gallon kit!