LRF
I haven't learned yet how to post pictures(I surprise myself that I can post comments).Just take a 8-10" 3 corner file and very slowly grind the teeth off, being careful to avoid "burning" it.Grind in the middle of the wheel, so you wind up with 3 concave(ie hollow ground)surfaces.This gives you 3 edges to scrape with.I sharpen them with wornout 320 grit abrasive backed up by a file,two edges at once, across the"concave". Other people use a stone,and one of my friends used a buffing wheel,to sharpen them. I resist using a buffing wheel,I've grown to like my hands and fingers,proper scrapers are sharp.
Mike
