Here is a great video that teaches you how to sharpen a knife with no edge from scratch. Richard is sharpening a hand made, hand hammered knife he got it from his friend no cutting edge on it. Watch this videos to know how he out a single bevel edge on a knife with no edge at all. He uses DMT diamond plates ,Spyderco ceramic stones Models 204F and 204UF respectively. He also use surgical black Arkansas stone as a final blade polishing stone.