I recommend DupliColor Wheel paint... This is Silver HWP100 paired with clear HWP103. Remember, good paint results are in the prep. This was aircraft stripper stripped, then 400 sanded, then 800. 1 coat of primer, 3 or 4 coats of base (don't remember), and 2 coats of clear. The clear goes on milky but dries clear... so don't freak out.
I will be refinishing my wife's style style 192 Mtech package wheels on her E83 in the upcoming months. Going to use the same process/materials I used on those e30 wheels as they came out amazing.