I use PlastiKote for my own purposes. You can also get Sherwin Williams automotive paint in aeresol form. Sherwin Williams makes really great automotive paint. Talk to any bodyshop, they're right up there with the best of them. This paint isn't cheap, though. Depending on the number of coats and the size of your case, it could run you as much as $60.
My personal recommendation: Be patient, use many THIN coats, and sand sand sand. Those guidelines, coupled with a quality paint, will give you a good finish.
Don't forget the clearcoat and some high grade finishing polish!
Oh yeah, jd has a good point... You've got to give the paint a good place to cure. This is how I solved the problem... A little custom paint booth in my basement. Note that the fumes from these paints can be extremely strong, so if you live in a dry, warm place, it would be best to set this up in your garage.
You need the following conditions for the paint to dry properly and accept more coats well:
- Dry, not humid. Don't paint on humid days.
- Warm, not too cold. If it's real hot, that's not ideal, but chances are that unless you're in the direct sun, the heat won't adversely affect it. Just paint in the shade.
- Dust free. You really need to protect the wet paint. Even dust YOU can't see WILL be visible once there are two more coats of paint over the thing. It will show up as slight imperfections in the finish once it's all said and done.
Heh, here's what I painted my case in...