I have used 0000 steel wool, 3f,5f and even finer polishing compound to caustic blue and to repair blue on many guns since 1984. On a service pistol, the coating is more haphazardly applied. You will have thick and thin spots on the flats,thin spots along any cuts/ridges. You would have to block sand any flats to remove any high spots. To do it correctly would, imo, be extremely time consuming and you still would not have the same finish as a nicely done blueing job or a correctly done cerakote job. You could put 100 hours into making it shiny er, or put 10 hours into a glossy cerakote finish. Again this is just my opinion.