zinc alloy die casting polishing 1.gear boxes, enclosures, die castings, 2.high ... die castings, 3.ship accessory zinc alloy die casting polishing: Feature:MaterialAluminum/Zinc Processsand casting, gravity casting, low- ... of lathe. Surface finish process polishing, sand blasting, heat treatment, painting, powder coating, anodizing, electroplating, mirror polishing. Service OEM service available. ...