Profile: McDonald Diecasting Ltd. manufactures zinc die castings. We provide complete die casting service including die casting design & development, tooling & prototypes, manufacturing, machining including drilling & tapping, assembly and finishing, zinc plating, painting & coating services. Our zinc casting services provide components in a range of finishes. These finishes include chromate and passivate finishes, chrome plating, zinc plating, metallic paint, and powder coating.