I refurbed my genuine style 87 4.6IS wheels last week as they were looking a little sorry for them selves and I went for a complete change from silver to high gloss black and I wanted to do this little addition at the same time but the spray booth was only free for the one evening so I was limited by time so just went straight black and now I'm considering adding this other addition this Saturday.
I knocked up a template out of masking tape of the recess on the face of the wheel then sprayed the template away from the car and then stuck it back on to get a better idea of how it might look bear in mind it's not lacquered and the bolt holes and badge are not shown.
How they look black (I know not everyone's a fan of black but I'm just after comments on the alteration):

My template I made up:

Sprayed body colour steel Grey and popped back on the wheel:

