6 Wall panels of metal, namely, bathroom enclosure wall panels and assemblies made of steel with a fired-on porcelain enamel coating for use in new construction and for use in new construction and for refurbishing, renovating, and modernizing existing bathtubs, bathtub enclosures, shower enclosures, shower enclosures and shower bases and floors, bathroom walls, waterproofing interior and exterior walls of buildings, tunnels, train stations, stairwells, hospitals, subway stations and lobbies, and other public spaces