Dremel
one of the best tipps I got here:
use the dremel tool with a screw-on mandrel, a piece of 3M cut- and polishing wheel, shape it (on another cut- and polishing wheel) into a conical form and you can deburr almost anything. There was a video somewhere in this forum but I could't find it again the last time I looked for it.
In the video the guy cut a used 1" wheel in quarters with a hacksaw, that works fine. Just srew it on the mandrel, let it spin with littel rpm, hold it to the (spinning) "big" wheel and shape it. That's exactly the way I do it, with the exeption that I started to cut up new 1" wheels. One 1" wheel equals 8 for the dremel.
Mario