I recently bought a card scraper but have not attempted to sharpen it yet. Is there someone in the Triangle area who would be willing to demo the process if I dropped by your place?
I think that is one of the subjects that Bill Anderson teaches. It would be money well spent- you get to learn from a "world class expert." Last year, I took his plane making class. He is just south of Chapel Hill.
I am pretty close to you in Pittsboro, I would be more than happy to show the the process. I get back from my frozen north travels on the 31st. -1 Deg F Spokane WA