Cool wheels. I restored a similar set last year, this was my process:
#1, check for bends, have straightened if necessary.
#2, blast them with something that won't harm the aluminum (no sand)
#3, Etch Prime and paint, (do it yourself in or pay a shop for 090 Polaris)
#4, Hone out the center bore back to bare metal (the center caps wont fit with the new paint layers)
#5, bake the center caps for 10 minutes on low heat (while your wife is at the mall) wear hotpad holders on your paws and pry off the roundels with a pocket knife, use adhesive remover on the old glue, clean, polish (steel wool works well)
#5, buy new stick on roundel emblems for the center caps, (reinstall caps later with a fine layer of anti-seize compound.)
#6, buy new alloy style lugnuts, Coupeking has a nickel burnished set, others have the plated ones with the chrome cap, don't worry, they all rust over time--but the better quality ones will look better longer. AutohausAz sells them, Blunt can get the BMW ones, they are more expensive however.
#7, buy and install new metal valve stems, get them from blunt or the dealer. (try your luck at the old ones, new cores are available from BMW too.) My tire installer could not find a suitable rubber stem, the metal casting is too thick, so I got new ones.
#8 Get some 185/70/13 tires installed (sumitomo seems to be the popular choice)
#9 Wholla--and hope that you spend less than the cost of a new reproduction set from BMW Classic!
#10 These might not fit over a front big brake upgrade, keep this in mind.
Enjoy!
-=Ben