Hey Pike
I use Auto Air / Createx Paint, I only paint plastic bait bodies, The paint Im using is a waterbase paint, so when I do mess up, I can wash it off & start over.
I do airbrush onto craft paper to see what my colors will look like, before I shoot my bait.
I shoot diff types of paints, Pearl, Metallic, Candy & Opaque's , Dont forget once you clearcoat your bait the colors will pop out.
Theres alot of very good painters here, which Im sure will chime in.
Enjoy.........Mike