If a fella goes through the sandpaper grits, say 150 to 220 to 320 to 400 to 600, and at each grit he makes sure that scratches from the previous grit are removed, by the time he gets finished at 600 grit there aren't any visible scratches.
If this is in response to my technique and use of scotchbrite, I must emphatically assert that I didn't sand this one shown on this page. At all. I stated that the photo on the previous page showed a stock in which I employed sandpaper before scotchbrite. The lack of scratches in the photo on this page has nothing to do with sandpaper grit on this stock as none was used.