Question: the process used for super finishing the surface to achieve high class finish is

title: Surface finishing
text: Also known as a mirror finish . This finish is produced by polishing with at least a 320 grit belt or wheel finish . Care will be taken in making sure all surface defects are removed . The part is sisal buffed and then color buffed to achieve a mirror finish . The quality of this finish is dependent on the quality of the metal being polished . Some alloys of steel and aluminum can not be brought to a mirror finish . Castings that have slag or pits will also be difficult , if not impossible , to polish to a # 8 .