Master Hi-Flow S62 All-Purpose Precision Dual-Action Siphon Feed Airbrush, 0.5 mm Tip, 3/4 oz Bottle

Best airbrush for the money

Have 22 of these . They work great. Master airbrush is the way to go.

Dual action airbrush

This dual action airbrush works great on leather

It'll get you some $$

Not as good as top models like Iwata Eclipse ($140), Paasche VL ($70) or Badger 150..but for $40 airbrush--it does well enough to get an artist paid & recommended.