40 Custom molding of patterns for producing steel castings and stainless steel castings for others; custom manufacture of molds for use in industry, namely, production of molds for steel castings from standard and specialty sands; custom manufacture of molds for use in industry, namely, production of molds for steel castings; prototype fabrication of new products for others, namely, rapid prototype sand casting of steel products; metal fabrication and finishing services for others in the nature of cleaning and finishing of steel castings, namely, burning and cutting, finish grinding, heat treatment, and blasting; processing of steel and steel products in the nature of steel castings, namely, machining, pickling and passivation, surface hardening, and painting and coating; custom additive manufacturing, namely, building of rapid prototyping tools via additive manufacturing; custom fabrication and production via steel castings of parts, namely, valves, regulators, parts for the oil and gas industry, parts for mining, construction, and heavy equipment, parts for the transportation industry, and parts for the defense industry; pattern printing in the nature of custom design and production of patterns for use in industry, namely, design and production of patterns for producing molds for steel castings; metal fabrication and finishing services for others in the nature of maintenance of patterns for producing molds for steel castings, namely, cleaning and repairing patterns for producing molds for steel castings