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Make sure your beveler is sharp, you can polish it by loading a nylon shoe lace or piece of paracord with Chrome Oxide or metal polish, clamping one end and running the beveler on it backwards,
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Nice work, an edge beveler, to round the corners and a hand held sick type or plastic, or wood wheel can be hand held or mounted to a drill and some bees wax, hideglue or even white craft glue will...