Huskerguy,
I've used automotive acrylic touch-up paints for models for years with great success - but I've found the spray cans easier to play with than the little bottles, because the paint in the bottles is really thick and needs massive amounts of thinner to allow it to flow through the airbrush.
I use short lengths of large diameter drinking straw as a nozzle to spray the paint directly into my airbrush jar, then thin it a little, and then spray away. It goes on very well and lays down very flat, so it's easy to lay down multiple coats without excessive buildup.
I've never had a problem with the paint or the thinner damaging the innards of my airbrush. I just thin with normal automotive acrylic thinner.
Cheers,
LeeTree