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I've been using card scrapers for years and volunteered to do a demo on them with our local woodworking group. I had been given a set of five a couple of Father's Days ago (possibly from Lee Valley) and thought I'd work them and let the members have a hand on experience. First problem is I inadvertently swept my burnisher ('73 Capri pushrod) off the bench and into the trash so needed to replace it, got Ron Hock's. Decided to follow the latest advice and prepared the faces and edges thoruoughly. Now comes the problem, the burnisher forms a burr but it is rough. Used oil, tried light pressure, heavy pressure, slight angle, large angle, and on and on! May get a handful of curly shavings but the rest is dust.
So I figured it must be my technique so went to an open shop this morning and had a few other hand tool guys try them. Different burnishers, different techniques but still no good results. I've refilled the edges, honed the faces on a 1000 then 6000 water stone but still nothing.
Needless to say, at this point I'm majorly frustrated. Has anyone ever had this occur? Could it be that the edge of the scrapers is so work hardened that it won't hold a burr or burnish very well. As you run the burnisher over the top squarely once or twice and then put an angle on it you can actually feel the metal drag on it and yes the burnisher is lubricated! A bunch of guys that tried today and especially me would appreciate any help or input.
Thanks in advance -- John