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Dremmels can ne used. I just dont recommend it. Way to damn dangerous when working on a blade IMO.

Many razors still have an elogated hole. Even after restoring. My understanding it they were punched from each side and just were not lined up as well as they should have been. It doesnt move much in...

The first one will have pitting left even after some hand work. Unless you have a belt grinder. It could be made to shave.
The second one is going to loose a lot of heal to fix. It can be done. This...