Search:

It wouldn't do it any good. I would get rid of the protrusion. You could do it on a coarser stone with the edge off the stone and just focus on the spine anomaly. Then try the 4/8 pyramid and see...

Does this nick on the spine protrude so that it lifts the spine slightly at the point where the dent is ? If you have magnification check out the edge and see what it looks like up close. I would...