I convexed it with a mouse pad and sandpaper - the recurve is definitely a pain in the butt, and harder to sharpen. I kept the pad/paper right at the edge of the table, so I was able to roll the knife over the edge and reach the inside of the curve. It took a long time to do by hand <img src="/ubbthreads/images/graemlins/doh.gif" alt="" />