mc: rock signs
saw a professor take baby powder and blow it off his hand onto a rock carving, it seemed to work alright,,,,,,you can also cover carvings with shaving cream, lay a piece or aluminum foil over area and scrape over foil with a credit card...it will fill in the carving with the shaving cream making it easier to see..it will also leave impression on foil ...this method is great for old unreadable toombstones also.....