The Cobra in particular there are no highlights on the bodywork, the paint on all the pics looks very flat, maybe you have been using brightness/contrast instead of upping the exposure to get the highlights on the bodywork
I see what Fezz means. On all of these pictures, I turned the adjuster for color up and I think I brought it up too high, which is why the cars look flat. I'll be more careful with it next time.
But thank you all for taking the time to look and comment.