Treatment of materials by means of grinding, milling, drilling, turning, welding, or painting; modification, customisation and customised construction of motor vehicles and parts and fittings for motor vehicles; custom manufacture, modification and conversion of motor vehicles, motor vehicle components and motor vehicle parts; custom tool construction, smelting, smelting of metal, smelting services, casting, casting services, casting of metal; casting of cast parts; metal treatment; heat trea...