I was looking at a Kanoyama strop and I understand that they are top of the line. I am not concerned about the price, but the instructions they give for conditioning the canvas comes to quite a bit of work, including "wrapping by Nagura to polish the surface". Do they mean to use a Nagura stone? Has anyone actually done this? It's a long list of work steps and they say to repeat it three times. Any advice would be appreciated.