Profile: Sonic Plating Co. specializes in metal finishing services. We offer toxic free tin-zinc plating as a direct replacement for toxic cadmiums. We provide chromate conversion, passivation, baking, bright dipping, wax emulsion, striping and oiling services. We offer bright dipping on the surfaces of bronze, copper and brass metals. We provide both barrel and rack line processes. We offer chemical film on aluminum and cast aluminum surfaces.