... can measure the thickness of non-magnetic coatings ( e.g. zinc, aluminum, Cr. Copper, rubber, paint and etc.) on magnetic metallic base ... can measure the thickness of non-magnetic coatings ( e.g. zinc, aluminum, Cr. Copper, rubber, paint and etc.) on magnetic metallic ... can measure the thickness of non-magnetic coatings ( e.g. zinc, aluminum, Cr. Copper, rubber, paint and etc.) on magnetic metallic ...