I'm new to straights and I'm slowly coming up to speed. I'm about to flatten a couple of stones on glass with sandpaper. One is a new Norton 4000/8000 and the other a Swaty. My question is; if the stones are of a much finer grit than the sandpaper (1000 grit) wont the process leave the stones in a condition approximating 1000, more so than 4000/8000 or what ever grit the Swaty happens to be? Does it cease to be an issue after the first use?