Gtechniq - Car Care Products - M1 All Metal Polish - 100 ml Description M1 All Metal Polish is specifically formulated to produce an optically clear finish on any metal with no possibility of burning or introducing any marring to the surface being worked on. M1 will quickly polish brass, copper, aluminium, stainless steel, chrome, silver and many more types of metal. For best results use with a Gtechniq MF1 ZeroR Microfibre Buff Cloth.