The Zenith Polishing Kit is for use with Non-Ferrous Metals and contains the following 1 x GBT/72 Brown Polishing Compound Bar for the first stage polishing of Brass, Copper and Aluminium. 1 x GBA 12B Blue Polishing Compound Bar for the final glossing of above ferrous metals. 1 x 4 x 1in Stitched Calico Buff for use with GBT/72 Brown Polishing Compound Bar. 1 x 4 x 1in Loose fold (Unstitched) Buff for use with GBA 12B Blue Polishing Compound Bar. 1 x Pigtail.