"Zinc diecastings as a substrate to plate onto"

Zinc diecastings can be copper plated, then subsequently plated with other materials.

However, they are so subject to defects like cold shuts ⇦ huh?, which will produce blistered and/or stained plating, that they can be in a special difficult-to-plate category.

Please search the site for "plating diecastings".