lol actually i did most of the work with the scotch bright pad things on my die grinder. there is different grits. i did cut off the big boss where the valve went though and then cleaned it up with that big carbide bur you see in the pictures. then finished it off with the scotchbright pads. And i dont think im going ot polish it. Cause then ill just have to keep polishing it and ya i dont really want to do that.