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Maybe so. Scrape or sand the surface rust off and see what you've got.

Celluloid scales sometimes begin a chemical decomposition which will corrode steel. It may or may not be what happened there but it resembles some I've seen before. If that is what it is the scales...

Almost looks like isolated cell rot. Like G said, get to the bottom of that spot and see what you've got. The 1056 is a fairly heavy grind so you may end up with a shaver but doubtful that you'll...