Epoxy paint on a dash

I don't see why you couldn't swing that. Be sure to prep it well, that's the Meat and Potato's when it comes to a finish turning out and holding up decently. You could also go to your local auto paint store and pick up a 2K spray can of a Satin Black or something similar. It's a two part formual (Paint/Hardener), they can mix you up any color and will be more rugged than anything out of a normal spray can.

Good luck