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I have a Dubl Duck which I restored. It was in bad shape when I got it. I had to take quite a bit of metal off to get all the pitting. It honed well, and is usable, but dang is the cutting edge thin....

I sand mine down using a piece of sp wrapped around a cork.
I would start at about 800, see if it gets enough of the pitting out to make a usable edge. IMO that would not destroy the etch. If that...