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True, if you've never cleaned up the threads on a bolt with a wire wheel (and caught your thumb a few times to learn how to use rotational direction to your advantage)or sharpened a lawnmower blade...

Safety first, of course. Wear eye protection and don't let the edge get up off the anvil. Don't let the buffing wheel turn opposite to the blade edge. Lynn has a great demonstration on the "World...

You should get DREMEL because you're a MAN. Whether it's the right tool or you have the right bit chucked up in it is another question, entirely!