I bought a la grise coticule last fall, and tried to use it as my only stone to hone my razors but just couldn't get it to work for me. I just couldn't get a nice edge, and I wasn't willing to put in the time to make it work, so I decided just to use it as a finisher. During that time I also picked up a Jnat here on the BST to use as a finisher as well. So a couple of weeks ago, I ran a few of my razors through a Norton 4k-8k-coticule, or a Norton 4k-8k-Jnat, and kept a spreadsheet of what I did.
Generally I felt the Jnat edges were a little better so was inclined to use that stone more, but today I pulled out my B&B Le to shave my 2-day growth and it took it on easily. I found myself thinking that I really liked this edge as I was shaving, and that it must be the Jnat. Afterward I pulled up my spreadsheet and low and behold, it was done on the coticule! Boy was I surprised. Turns out that coticule can give me a good edge as long as I use it as a finisher, and I'm sure it has more to do with the user than the rock.
Generally I felt the Jnat edges were a little better so was inclined to use that stone more, but today I pulled out my B&B Le to shave my 2-day growth and it took it on easily. I found myself thinking that I really liked this edge as I was shaving, and that it must be the Jnat. Afterward I pulled up my spreadsheet and low and behold, it was done on the coticule! Boy was I surprised. Turns out that coticule can give me a good edge as long as I use it as a finisher, and I'm sure it has more to do with the user than the rock.