hi mate,
i powdercoated them the hub colour, then carefully scuffed the rim with a scotchbrite pad to key the paint. Then i used fine line masking tape, to get right into the groove, then finished by masking the rest of the hub with normal tape and brown paper.
theres a local bodyshop supplies that mixs the paint from the og codes, so they mixed me up a few cans. most bodyshops will do the same, as there is so little paint needed, not worth getting a proper gun out, and then clean it all etc!
good luck :thumbup: