I just tried some Rustoleum "Painter's Touch" water-based enamel. It's an all purpose interior/exterior paint. When thinned down, it sprayed very well through my badger airbrush. I do light coats and dry with a hair dryer between coats. I also use an auto touchup gun on larger areas. The latexes dry fast and you might have dull spots, but when you put your final clearcoat on it evens everything oyut. I've used the house paints for camo colors with great success. At Home Depot they can scan your color samples and match anything. It's worth experimenting.