I found a pretty damn good tutorial for removing paper rulings from sketches. I don't know how many other people on here would need this, but it seemed like something that should be passed around for the sake of sharing useful information.
Tutorial here. <p>-------------------------
"It has always been the prerogative of children and half-wits to point out that the emperor has no clothes. But the half-wit remains a half-wit and the emperor remains an emperor." -- Sandman "The Kindly Ones" </p>