My fingerprints take a daily beating. I don't know how glass artists prevent getting all the little tiny cuts. I don't. Combine this abuse with a black Sharpie pen (I use sharpie on glass to trace lines around stencils and clumsily turn my fingers black) and I've stains the cuts as well!
Today was just a day of cuts, I got myself with some thick paper (ouch, paper-cuts are the worst) and then somehow took off a chunk of a finger on the edge of my screen door, then a few run-ins with the sharp edges of glass. *sigh* Its amazing the way the hands heal. Thank you mother nature.