As Far as a Progression Goes..I Use a Naniwa I K, 3 K, 5 K, 8 K, 12 K...Then Maybe a Higher Grit Natural...But..The Current 12 K Naniwa Super Stone has a Far Higher Grit Finishing Capacity than its Grit Rating..I Can Knock Out around a 15 K Edge with it...Its a Great Stone..I Can Jump from a...