Hi Lee. I checked this and there is actually a specific Porsche paint code that is designated for the alloy wheels. Not one of the wheel refurbishers that I spoke to knew what the code was and all used a generic silver. The only place that knew the paint code was Specialised Paintworks in Reading but they were only prepared to do the wheel face rather than the whole wheels so I didn't use them. I checked their wheels to an original and it looked correct. I have the paint code at home somewhere if you are really interested.
Regards
Regards