Thread: Chinese 12k question (s)

Rottenstone can be found at woodworking stores. It is a powder made from decaying limestone. I have used it in the past on a paddle strop. It is very fine and breaks down with use. Maybe 1.0 micron? I put mine in a electric coffee bean grinder and powdered it first. I wanted to break up any large grains.

One of its traditional uses is to combine it with parrafin oil and use it as a final polish on wood, after varnish. Pumice is used first.