Here's a project I did a year or so ago for school.  We had to come two found objects, and alter the surface of one of them.  I found a suitcase at salvation army thrift store, and collected several prescription bottles.  I spray painted the surface of the suitcase, and covered the whole thing with rhinestones!!! I'm not sure how many were exactly used, but it was definitely over 200.  It took a long time, but it was definitely worth it.  I think Paris Hilton would be jealous.