I took it upon myself to flatten my new Norton 4000/8000 and my Naniwa 12k, and they turned out to be un-flat from the box. Now they're flat, but the surfaces are rough and almost gritty. I cleaned them and put one of my good razors on them and now I have a rough, micro-chipped edge. It still shaves fair but is harsher. Am I supposed to "polish" the stone or smooth it somehow after flattening? It was really disappointing to lose my smooth edge.