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And I forgot to add - don't start with the lowest grit hone you have, but rather work your way down. Is a 4000 working? If not, then move to 1000. If 1000 doesn't do the trick, then go lower if you...

Totally agree with the last part of this, but have to say that I've gone as low as 220 to repair a truly messed up blade. I'd certainly not recommend it as a matter of course, but if one has to...