Zinc Alloy is the process by injection mold. The Quality is harder so fine polish can be handled to achieve better surface finish. In the mean time, the cut-out part on the product can be rather tiny and sports better 3D effects in comparison with Stamping process .Antique plating is ideal plating  process for Zinc Alloy. In-fill coloring is also available Pantone color chart can be guided to match.Pewer is softer process by Spin Cast. The metallic surface finish is worse than Zinc Alloy due to its softness.