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Takes a while but careful strokes and the jig puts a curve into the stroke, then move it along the width of the stone and repeat, would not want to do it on a machete but a folder is fine.

Almost certainly shelley.raskin@icloud.com send me a pic

A few of yiu know that I make knives and sheaths and also sharpen knives and have various different methods of sharpening, until recently I sharpened convex edges on a slightly slack belt on my 2x 48...