Most consumers do not know the biggest warning signs indicating a vehicle may have been in a major accident, according to a poll conducted by CarMax, Inc., the nation?s largest retailer of used cars. Most respondents (72%) said that repainting the car is the strongest indicator of vehicle damage, followed by clamp marks (18%), bumps and dents (8%) and scratches (2%). However, according to CarMax?s knowledgeable car-buying professionals, clamp marks on a vehicle?s frame are the biggest sign t - submitted by AOL Video Uploads user bev.yehuda@multivu.com