Quick-Step High Polish Disc by Walter Surface Technologies can produce a glossy and superior mirror finish on the surfaces of aluminum, steel, stainless steel, and other ferrous or non-ferrous metals. Metal polishing disc helps removing minor scratches to provide #4 finishes. Power finishing disc is recommended to perform at the rotational speed range of 2000 to 3000 RPM. You can use Walter polishing paste 07-T 901 and 07-T 905 for hassle-free performance.