Have you thought about the aeromax finish that aerocoat do?
I think cossy on here used them to refurb his ed30 rims.
Lots of peeps on uk-mkivs.net use them for the BBS RC rims from the anni. Powdercoat finish is spot on, there not black and not grey, give a very high shine finish. See if i can find any links for you.
Would look spot on against silver..