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I have a very nice set of Mitutoyo calipers that consistently read to half of a thousandth. It's also possible to interpolate with a quality micrometer. I purchased all of my precision measurement...

Even 150-grit removes material more slowly than you would think. I measured the edge thickness of a blade after grinding and after hand sanding. I started sanding with 150-grit, trying to thin the...

Not a razor restore, but I know that my mother spent about 2 months (an hour or two per day) hand sanding her new sashimi knife. She has a lot more patience than I do. I think she started at 220 and...