A friend of mine had his ZX10R wheels painted gloss black with a gold flake and that looked gorgeous when the sun light hit them. Sadly he hit a traffic bollard at speed and destroyed both wheels about a month after getting them finished.
I have just repainted my new front wheel silver to match the rear and it has come out lovely.
I used rattle can wheel paint made by a company called Car Plan and a really good etch primer suitable for aluminium. To get the old paint off I used Strypit paint remover and plenty of wet and dry paper and I am very pleased with the result.