6331 Ceramic/faience and terra-cotta facing units to walls and soffits (0) Ceramic/faience and terra-cotta facing units as a decorative surface to walls and soffits, externally and internally 6332 Prefinished sheet metal facing panels to walls and soffits (0) Porcelain enamel, powder coating and similar finishes to steel, stainless steel and aluminium modular facing panels, as a decorative surface to walls and soffits, externally and internally