There's a finishing section in the general thread area.
There's one guy that powdercoats misc. items for TR people. He actually makes the powder at his job, and powdercoat valve covers and misc. parts on request. Since he makes the powder, he can custom mix colors. Colors that aren't even available on the market. He only does it to make a few bucks on the side. I bought a mp3 player from him, forgot his name. He's usually on TF.