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I have use a Dremel for a variety of uses when doing razor repair. Each time I do, they scare the crepe out of me. I use them at the slowest speed, mostly with radial wheel for removing rust, never...

No, belt sander!

Heat is a blade killer, just takes a second, literally.

A 1k diamond plate or 1k stone will reshape it just fine, and more importantly safely. You can buy a $30 1k /600...