Metal polishing engine parts or motor bikes

Use 80-100 grit abrasives over numerous hand tools, linishing machines, sanders and so on to flat all the flat surfaces, curve all the curved surfaces, this includes all the tight areas. This involves some reshaping by nature of the metal polish process. Sometimes when working through the abrasive stage small pitting can appear. This can limit how much we sand the item, as when these pits appear no amount of sanding will remove them as they are in the composition of the metal itself.