So I'm a little new at sharpening and I managed to make a little "dip" in the edge of my CCK cleaver, so the edge doesn't contact the board in that spot like it should. Good thing the CCK is relatively cheap. I'd like to try to fix this -- what's the fool-proof way for a beginner to go about this? I am thinking I should avoid power tools so that I don't (a) overheat the blade and ruin the temper, and (b) make it worse by removing metal faster than my brain can figure out that I'm doing it wrong. Should I just get a set of metal files? Maybe sandpaper taped to something hard? Do I want to go at an angle as if I'm sharpening, or do I put the edge perpendicular to the abrasive, producing a completely blunt edge with the profile I want, and then go back and sharpen it? I only need to remove about 1mm of material on either side of the dip, or maybe even less, to get back to a smooth profile.