My airbrush has a #3 tip. Sprayed the Future at around 25-28 psi. I'm far from an expert at air brushing but the results were good. I just did a couple light mist coats, let each dry a few minutes in front of a space heater (hair dryer works too) then wetter coats drying between coats. For me, letting each clear coat dry a minute or so, using the hair dryer smooths out orange peel.