Here’s a link to some automotive paint guns
http://www.eastwoodco.com/jump.jsp?i...mType=CATEGORY
Binks, DeVilbiss, Iwata, Sharpe, and others make guns that sell for under $100 as well as guns that sell for several hundred.

If you’re just doing coats of paint, then masking and spraying large graphics, you can probably just use a spray gun. If you’re doing fine lines, weathering, etc you’ll probably need the airbrush.

If you can meet a painter at a car or motorcycle shop, you can get local recommendations and possibly find a reasonably priced local source. You want to get something that is good quality and is repairable.