Sharpening the reverse-cambered Yarri plane
At first, one thinks it is difficult. However, it is not more difficult than sharpening chisels and knives. Proceed in principle as you would when sharpening the regular Yarri Kanna.
The cross-section of the blade is nothing but a triangle, consisting of the two bevels and the flat side. To sharpen the flat side and the two bevels, use a small shaping stone (from the sculptor's set of Japanese water stones). Clamp the tool with the handle so that you can move this shaping stone freely over the bevels. After a certain time, two burrs will form on both sides of the flat side. The honing, that is, the removal of the burr, is done by performing the same movements with the finer honing stone. Always follow the shape of the iron with your movements.
