Material treatment in the nature of treatment of ores and metals, namely, metal treatment, metalworking, metal stamping, metal welding, brazing, chromium plating, nickel plating, tin plating, recycling of metal; services provided during the custom manufacturing of metal products, namely, forging of metal goods to the order and specification of others, custom metal rolling to the order and specification of others, machining metal parts for others, and assembling of metal sections for others