Randy,
I don't know the law about that, but I think they are in the wrong. When I had my Cobra they had a stand at one car show I was in that would take a picture of your car and put it on T-Shirts or jackets, but you had to prove that the car was really yours and they wouldn't use any picture that you had taken. I was told that was to make sure that the car I was having them put on a T-Shirt is really mine and to protect them from any legal problems. Also when I went to the Convention Center I went in and asked them if I could use the building as a background to take a few pictures of my car. After verifying that they were just for my personal; use, they told me to take all I wanted.
Ron