I haven't used Dupont for years, so I can't help with system advise, but I'd look for something that flashes quickly.

Before you paint, blow the shop out a couple times, and let the exhaust fan clear it. Then wet the floor, blow the shop out one last time, before tacking off, and keep the floor wet while painting. I've never had a great booth, but I cut and buff everything, so you I know for fact you can produce a great job. The biggest problem is a very light color, like white, with a clearcoat. The easiest is a medium pearl or metallic, which hides very minor imperfections.