What surface treatments can I use for my die castings?

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PURPOSE ALUMINUM ZINC
Decorative finish

Paint Polish / Epoxy Plate

Powder coat

Paint Plate Chromate Phosphate

Environmental or galvanic corrosion barrier

Paint Chromate Anodize Paint Chromate Anodize
Fill and seal surface and subsurface Impregnate Impregnate
Improve wear resistance Hard anodize Hard chrom plate