Painting or Powdercoating Aerospoke wheels

I was talking to Fred about this a while back as my red spok needs a little touching up.
He suggested going to a model shop and getting umbrol paints, they should let you take the colour outside so you can match it up in the daylight etc.
Havent got round to it yet, but thats what I'm gonna try.

they're enamel too those paints, used them on airfix models when I was young. Will def try that shit out. Guess I could used it on the frame maybe to cover up minor cosmetics?