Thinking about buying another car and wanted to learn how to quickly find bondo (without the old magnet trick). This site seems very gimmick-like but if it works, it would be sweet. I know NASCAR uses a much more high-tech version of this to measure the thickness of frame rails to prevent cheating but was curious if any of you body guys know if this works. Let me know. Thanks!
http://www.fillerdetective.com/index.php?main_page=product_info&cPath=1&products_id=2
http://www.fillerdetective.com/index.php?main_page=product_info&cPath=1&products_id=2