... steel, iron, plastic, PVC etc.Machinery and Equipment: Anodizing, chrome plating, zinc plating, nickel plating, polishing, brushing, power coating, vacuum vapor deposition (PVD), etc ... alloy, brass, copper etc.Surface Treatment: Zn (Cr3 RoHS free or Cr60) plated, Cr\Ni plated, hot-dip galvanizing, paint, anodize ...