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Set a bevel on it with a 1K stone. See if you can get good steel along the entire edge, you will need at least 10x magnification. If you have good steel along the entire edge or can get to it, then...

It could change the color a little, but will not damage them.

Here is what I would do. I would do a light cleaning on them to remove the surface rust with a single edge razorblade like mentioned above. Then I would take it to a 1K stone (with a taped spine)...