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I am going to put it this way, the file or rasp made out of something harder than the steel your using at will definitely work. The smooth stone probably also works, jewelers and watch makers use...

I would put money on it acting pretty much like a file as in Pam's post up top. So finer grooves finer finish?

whats a sen and a mill file? are they texturized?

Well the only way you could get a mirror finish with a 1k would be by arranging the slots or grooves created in perfect configuration so light would bounce of properly but the edge would still be a...

I believe it comes to the size of the grooves. I don't think its possible to achieve a mirror polish with larger grit sizes regardless of technique. The smaller the grit the smaller the grooves and...

Imagine a plane, then cute the grooves from a sharpening stone forming what would look like channels on it. Then flip it 90 degrees and do the same you should end up with something that looks like...

Just wondering if anyone mentioned changing the direction of the slices to form a plane.