So, I figured this was the best place to bring this up. I ran across this image as an item up on u-pay marketed for sharpening straight razors. Never having heard of anything like this I thought maybe some of you guys might be able to shed some light on this.
http://img.auctiva.com/imgdata/1/0/3...11284369_o.jpg
Norton, Naniwa, Shaptons, PHIG, etc...now Marbles?