Hello! My son recently purchased a 1999 Wrangler TJ for $6,000. He was told at the time of purchase as well as in the ad that it didn’t have any frame rust. It was undercoated. However, now 2 weeks later he noticed that the undercoating was peeling and when he looked closer and peeled more of the undercoating off it was very bad. I’ve included pictures of a portion of the frame. Is there anything he can do to get any money from seller? It was taken to a Jeep frame repair shop and got a quote of $3,900.