Treatment of metals; [ electrolytic coating in the nature of electro-plating, tin-plating, gilding, galvanization, metal plating, metal casting, metal tempering; welding; soldering; metal coating in the nature of plating; ] coating of metal parts by laser or plasma soldering; hard resurfacing by laser or plasma; [ material treatment information; ] all the above services excluding electrophoretic coating services or services relating to electrophoretic coating or electrophoretic processes