from the damage I saw on this car the undercoating would not have helped. My car currently has this coating but I am planning on running the "Coba" tires on the street and the owner said they cling and throw the rocks and stuff up very hard. I am talking about an area of 3x6 inches of no paint - just nice aluminum. In my case I don't want the spider cracks or worse to occur. Thanks for your replies.
Cracker