I'm like Geoff. I use the big one which has 5 bands inscribed around it. For bodies, I decant Tamiya and Model Master lacquers, don't thin them and shoot at about 20-25 psi. The big one also works for spraying thinned craft acrylics which I use on chassis, suspension and engine parts. I have a nice dual action brush that was over $100 retail, but I never use it any more.