I have news for you that loom strop with the green paste is not chromium oxide. It is Dovo green paste which is much coarser. Its grit is about 6 microns. The next finer would be the red at about 2-3 microns and then the black paste is for finishing. Chromium oxide is about .5 microns. So you thought you were finishing with a pasted strop with a grit equivalent of a mid range stone.