I just got my un-anodised alloy parts powder coated by this chap
http://www.ebay.co.uk/itm/Rc-Cars-Buggys-Powder-Coating-/131128519499?pt=UK_ToysGames_RadioControlled_JN&ha sh=item1e87de6b4b
& very happy I am too!
Here's what I had done in black!
Three parts plus the shims under the ball ends £18 inc shipping back to you.
Pretty good!