The product known colloquially as Good Old Five-Fifty-Five is the preferred choice among expert polishers for achieving a mirror-like finish on firearms following the use of Polish-O-Ray 500. For optimal results, it is advisable to use hard felt, followed by loose muslin, for each grit level as you progress. You may conclude the process at any of the three grit stages once the desired finish is attained. It is recommended to experiment with different combinations and sequences to determine the most effective approach for your workshop.