DT--the luthier I was talking about made his own scrapers out of old handsaws (you know, the ones you'd use to cut dimensional lumber with). A hand saw from a garage sale will provide enough material for quite a few scrapers. Cut them out with a good hacksaw. Cut slow so you don't lose the temper.
Badger--I do roll the burr when I sharpen mine. I just square the edge with about three passes with a file and then roll the burr with three passes with the steel (sp?) kitchen knife sharpener (while my wife isn't looking). The luthier who taught me how to sharpen these things insisted that they should be sharpened every 15 minutes or less. Now I don't get fancy but I sharpen my scraper more often. It takes me less than a minute to put a fresh edge on a straight scraper--if I can find my tools....
Roger--Thanks again. This is a perfect archive thread. Did you ever read the Torges article in TBM about card scrapers?
J. D. Duff