I was converting my S-20 today when I decided to try my Dremel #115 HSS cylinder cutter to grind down the rivet heads instead of my usual mounted stone bit.
Picture from Buy.com
I had mistaken it for carbide, but it is actually HSS. Still, the thing ate through all three rivets faster than any abrasive point I've ever used. Unlike the abrasives, this bur didn't create any dust, only some fine, steel shavings.
I checked the edges after the job, and it still looks good! Even running at top speed in my rotary tool has left it looking fine. It's a nice bit of kit if you're lookin