I use the Paasche type H single-action. It has very few parts to clean up which is a big part of airbrushing. They don't work very good if not clean. I use mostly Testors enamels in the 1/4 oz. bottles thinned about 50/50. Clean up with Gojo hand cleaner, pipe cleaners, and Q-tips for the bigger part of openings. Of course paper towels come in handy. A small squirt of Model Master enamel thiner just before I paint just in case a little Gojo is still in the airbrush. If you go from a light to a darker color sometimes you can switch colors without any cleaning. Just spray a little on a white piece of paper you tape close by to test your spray. This is the cheap way to go for me. Sometimes I use paint collected from a rattle can which is usually thinned about right for use already. Hope this helped.