You can rejuvenate old paper items like the covers of used paperback books - or worn posters by touching up the worn spots with colored markers. It works particularly well with books with black designs - but other colors work as well - This is particularly good if you are going to them cover the books with contact paper - as I do with all my music books. Once covered, they look quite new! (You'd be surprised, lower level antique dealers and such use markers to touch up their wares all the time.)
