I have a question about honing with the 1K Norton. When I hone on this stone there doesn't seem to be swarf (black) coming off. There is a lot more off the 4k. I am wondering because it seems to cut slowly. I was wondering if this is typical of this hone or if it needs some preparation like the 4K and 8k such as sanding it down. I usually soak the hone for 30 minutes or longer.