I hand grind my drill bits, but do not know how to explain how to do it over the computer....
One of the most important items, outside of patience, precision and good lighting, is a simaltaneous rolling and changing the angle of the drill bit. This step is critical to get the clearance but comes only with practice.
As far as grinding a reamer I know of no way to hand grind a reamer. This is a certain path to ruining a reamer in my opinion.
With a small abrasive stone, for example a 1/4" X 1/4" X 6", you could "stone" the radial face of the cutting edge to get a fresh edge. DO NOT TOUCH the outside diameter of the reamer with the stone. Only the radial face of the cutting edge.
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