RE: Airbrushes for scale modelers
One thing that may or may not have been clear is that you START and STOP your paint OFF your subject. You never begin ON the subject. You'll end up with splatters etc that way. Same for the ENDING ..go Past your subject and then end the stroke.
Most of the Major brands will get you were you want to go. The compressor, regulator and water trap are all important too. The most important part of the equation is YOU. Just like any other aspect of the hobby.. good luck and have fun.