You want to go lengthwise of the barrel, cylinder and the frame, not crosswise. Think long direction rather than short. If you have to resort to wet or dry paper for scratches that Scotch-brite won't remove be sure to use a sanding block, I use WD-40 to lubricate the wet or dry paper. I use an Art gum eraser as a sanding block,when done with the wet or dry polishing and are satisfied the deeper scratches have been removed then you can use the grey Scotch-brite. For final finish I use a dab of Simichrome or Flitz on the Scotch-brite. Wipe off with a microfiber cloth and wax with Ren wax polishing with microfiber cloth.