Krylon Indoor/Outdoor paint = Looks great, dries fast, easy to use, doesn't stick to aluminum very well.
I think I am going to have to use an etching primer to prep the surface of the aluminum to hold paint, then I think the Krylon will work well, as long as it doesn't react with the primer. Time to go to the auto body shop to see what they have for self-etching primer, and who knows, maybe I will find a better trim paint.
It's just too bad things cost at least double at an auto body shop compared to hardware stores. I guess you get what you pay for in the end!