Chromium plating; nickel plating; metal plating by electrolyze; burnishing by abrasion; material treatment, namely, conversion, chemical and physical treatment of steel, inox steel, cast iron, aluminum and alloys thereof and abs by plating or coating these materials with copper, nickel, chrome, gold, silver, zinc, iron, tin, lead, cadmium or aluminum, anodic oxidation, chromating, passivation, rinsing, pickling, degreasing and/or galvanizing to improve appearance, texture, durability, degrease and/or deodoxidize the surface