Hey folks, I've been getting ready to teach a Boy Scout troop flint and steel. I noticed that I chewed up the sharp edges on my flint while making and testing strikers. I KNOW my guys will be bashing away for a while before they get the hang of it. Is there a simple way to re-touch those sharp edges? I have a copper pressure flaker but the spalls are pretty rough hewn and it seems that might be too thin of an edge. Thanks!