... magnetic coatings ( e.g. zinc, aluminum, Cr. Copper, rubber, paint and etc.) on magnetic metallic base ( such as steel, iron, alloy ... such as lacquer,Varnish, paint,anodizing) coating on non-ferrous metals (such as copper, Al, Zinc and etc) and also on austenitic VA ... such as lacquer,Varnish, paint,anodizing) coating on non-ferrous metals (such as copper, Al, Zinc and etc) and also on austenitic VA ...