Any kind of spray paint will work, just remember to prep it correctly because the key to a good paint job is the preparation.
If you can get to the rivets from the backside you can use a dremel with a cutting wheel and cut off the back side of the rivet so you don't take a chance of damaging the front side of the case. Why do you need to take the case apart anyway? You don't necessarily have to do that to paint it. I wouldn't be drilling out any rivets though if I were you.