The zenith clean and finish kit is suitable for ferrous and non ferrous metals the kit contains 1 of each of the following 4in medium satin finish clean mop 4in x 1in sisal buff grey polishing compound for ferrous metals brown polishing compound for other metals pigtail bit for fitting to a drill or bench grinder they grey polishing compound is used for the first stage polishing of steels and stainless steels to remove metal imperfections the brown polishing compound is used for the fir