Painting or Powdercoating Aerospoke wheels

can't you get some special pens from japan? yasimax inkys i think they are called there's some shop that sells them but it's really hard to find they do all the colours to match the keirin race jerseys (including white obviously).
so fans can get autographs from their favorite riders in the correct colour. there is even a tiny njs logo on the inside of the lid.

I firmly said jokes after advice