The Zenith Clean and Finish Kit is for use with ferrous and non-ferrous metals. Contains the following: 1 x GBF/64 Grey Polishing Compound Bar for first stage polishing of steels and stainless steels to remove metal imperfections. 1 x GBT/72 Brown Polishing Compound Bar for the fi rst stage polishing of Brass, Copper and Aluminium. 1 x 4in Medium Satin Finish Clean Mop.1 x 4 x 1in Sisal Buff.1 x Pigtail.