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It is either where the bevels are not meeting, a chip or rolled edge.

Looking straight down on the edge and turn the blade a few degrees either direction, the light will reflect where the bevels...

If you had micro-chip, fuzz, a 12k super stone can easily take them out.

Put one layer of tape on the spine and do 1 set of 20 circles on each side and 20 X laps with weight of the blade pressure....