Ultra Polish uses a smooth buffing medium to bring aluminum aluminum to a mirror finish, and restore acrylic windshields to optical clarity. It is also ideally suited for removal of fine scratches and scuff marks from fiberglass and paint surfaces restoring the original showroom shine. We highly recommend that you use MET-ALL Prep Polish (p/n MA-P37) to remove heavy scratches and oxidation before using Ultra Polish. 16 ounces. 2 lbs (1Kg) shipping weight.