Posted By: Lionel Joyce
1 people found this review helpfulUpdate a year later. Was having trouble getting any edge at all on a friend's antique carving knife in what must have been a quite soft stainless. Plus the edge had a double curvature: concave near the handle, convex towards the tip. An inexpensive, 220 grit stone that I use for beater knives was having no effect whatsoever, and on my decent Cerax320 the curvature was affecting the flatness of the stone. So I turned to the Pop Rocks, and within a few minutes of sharpening on the 1" face of the stone - to deal with the knife edge curvature - I had a paper-slicer.
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