... 38crsi, Magnesium alloy, etc.Surface treatmentNickel plating, zinc coating, chrome plating, and oxidation, Polishing, chrome plating, ... Nickel,silver,copper, zinc .etc. and anodized ,powder coated, polished ,sand blasted, chemical surface treatment. ... polishing, zinc plating, nickel plating, chrome plating, powder coating, phosphate coating Brass Copper parts machining1.Materials: Cu-OF, CuAg0 ...