Files and rasps are sharpened by dipping them in an acid bath.
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Greetings! I'm a long time lurker that finally got around to registering. . .
I believe Boggs actually sharpens files and rasps with some sort of abrasive blasting process. I've not tried them but all of the reports I read have been very favorable.
Back to the original post. . . Does anyone have experience with the F. Dick handmade rasps? They are much more attractively priced than the Auriou and if they are half as good as their kitchen knives and steels they should be a first class tool.
Welcome, Barney! My understanding is the same. I believe they use a water/abrasive slurry under very high pressure and abraid the metal to reshape the cutting tips or edges (they also sharpen regular mill cut files).
A guy came to the local woodworkers club and made a presentation on what they did to sharpen files and that's what I remember.
Mike
Rasps can be sharpened with sulfuric acid.....thats what I use....Maloof does the same if memory serves me:confused: