I'm going to resurrect this thread to show what I ended up doing... Rather than painting my old Carrera Sport Design wheels, I decided to buy some used Carrera S 10-spoke wheels in Anthracite grey...
old wheels
new wheels
The first photo was taken in overcast conditions, and the second in late afternoon sun. I was amazed at how the Platinum Sliver metallic paint changes hue so dramatically in different lighting conditions... definite gold hue in the waning sunlight...