To polish the slide, I completely disassembled the slide first, I lay 320 grit sand paper on a large piece of glass so I have a very flat surface to work on , lay the slide on the sand paper and move back and forth making sure only the flats of the slide or touching the sand paper, onve the nitron is removed , I work down through the various grits of sandpaper until I get the amount of shine I want,...in this case I went to 2000 grit, I have a Glock I worked down to 12000 grit polishing cloth to get a mirror polish.