From the pix, it looks more like aluminum than stainless to me.

If it's aluminum, the choices are something like Robar coating (baked on paint) or anodize. Anodize doesn't work well on cast aluminum alloys, which many of these cheaper gun were made from. If it's aluminum, I'd go full ghetto on it and polish it after sculpting it. Aluminum will file very easily. Use a nice gun like a high grade Fox or Parker for the basis of your sculpting.

Last edited by Chuck H; 04/26/12 04:17 PM.