Josko,
I'll second the 'don't try to fix it'.
First, as pointed out by Parnelli, it's likely that the steel has been degraded somewhat by the flexing that caused the problem in the first place.
Second, since the jaws are (or should have been) made from hardened steel, the lapping process could be a lengthy one. Only you can determine what your time is worth...
Also, removing the metal from the inside surface of the jaws may (I've not closely examined a set, so I can't say for sure) effect how the jaws function.
All in all, I'd say the best course would be to call the manufactureer, tell them of the problem, and see about a new set of jaws. That's likely to be the least costly and most efficient way to fix this.
I do understand the desire to tinker (until recently I'd be the guy happily tearing the vise apart with a sledge waiting to 'tweak' the jaws backing into place). I've since learned a couple of costly lessons that have led me to leave delicate adjustments on quality tools to the experts.
Up to you, of course, maybe all you really need to do is give the jaws a good whack with the aforementioned sldege....It IS your vise (vice?), after all.....
Good Luck!
Buddy
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