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Yes, I have found that a slurried Jnat can reduce a feather, false or in some cases a full blown burr. A burr in my book is a portion of the steel that folds or rolls up and away from the side (A)...

It has been a few days since this thread began, and you may have figured things out already. But to suggest that you can fully lap and flatten a hard Jnat with a 1k or 2k synthetic, if you haven't...