... machining -Various finish treatment -Waterproof aluminum auto partsBasic information of this aluminum casting Household ... CNC milling, threading, tapping, drilling etc. c) Quality control equipments: Three-coordinate measurement instrument, RoHS testing ... coating, painting, sandblasting + anodize, E-plating, polishing + grindingZinc alloy parts: E-plating, electrophoresis, powder coating, painting, ...