... machinery, autos, equipments.4.Surface treatments:deburr,polishing,sandblasting,nickel plating,chrome plating,oxidation,plastic,spray-paint,ect. 2.Process ... punching,screwing etc.;4.Finishing:mill finish,electrophoresis,polishing,plating,anodizing,painting,powder5.Packing: Plastic film and kraft paper wrapped ... work Better products ,Better service,Better world! sandblasting anodizing aluminium circle