I did one for a mate, i think i have some pics somewhere.... Firstly, you gotta sand and strip down the old paint (obviously before this take the thing apart) Then use some decent primer, and throw on a few layers. From here you have a perfect start for any design. I used car spray paints btw. Lastly make sure you lacquer it to sheeeeeeiitttee. Ths more lacquer the better. The whole process takes about one to two months for a decent job. If you go ahed with it pm me and ill letyou know all our problems /findings and exactly how we did it to help
I powder coated one for BZ in orange, use a good paint stripper first then wash off, make sure you paint it in halves or the paint will crack when u take it apart, also don't over apply on the machined faces or go will not go back together.