Dremels are useful for removing too much wood or metal in a short time.

I much prefer chainsaw files, small "riffling" files and rasps, and good woodworking files. I have two Dremels, and use the reenforced cut-off wheels 95% of the time on both of them, and the other 5% is with a "Mizzy" wheel for delicate grinding of metal (and flint - you just can't get good, flat gunflints for flintlock muzzleloaders in the 100 count bags anymore and they have odd humps that need flattening).