My dad showed me how to sharpen when I was about six and I have been learning ever since. For a final sharpining I hand sharpen on stones ,but diferent knives call for diferant methods. For some knives I will do a polished edge with a hard Arkansas stone and oil. this gives the sharpest edge, but is not the most deurable and has to be maintained constantly. For a working edge I am sold on the DMT " diomend stones" they leave a microscopic saw tooth edge that cuts like crazy, and lasts a while between sharpinings. For knives with a deep belly and a curved edge I use diamond or ceramic sticks, the kind that stand uprite in a V shape. for thin blade kitchen knives or felet knives I use a steal. To me , knife sharpining is not black and white. You have to match the style of sharpining to the blade and the type of worke to be done.