Maston Hammer Hammered Metal Spray Paint is ideal for all types of wood and metal surfaces, indoors and outdoors. This paint delivers a surface resembling strong hammered enamel. Suitable for use on new and old surfaces, this is a great choice for upcycling, art and projects around the home. For aluminium, stainless steel, brass and copper surfaces, we recommend priming with Maston 1K acid primer. This metallic spray paint is designed for a hammered surfaced finish on wood and metal surfaces.