I just put a mirror polished edge on my 511. Scrapyard's steel is some seriously tough stuff. It was as hard as I've ever had to work on a knife. She's all polished up now and I used her to chop up some branches today working in the yard. The edge didn't flinch she's as sharp now as when I finished stropping her. I used an Edge Pro then a leather strop with compounds. I'm guessing it will be a long time before I have to sharpen her on stones again. This SR-101 is some high grade stuff and I'm likin it....