all depends what lacquer ur using thou!! M/S you want 2-3 coats whereas HS ususally its a grip and a rip but then obviously depends what line it is and what hardner/thinner u use and gun as said!!

At McLaren we used Dupont on the SLR's but were now switching to Glasurit for the MP4 12-C and any future releases..............

From memory places like lotus/aston etc also use Dupont aswell or used too anyway!