OK, John... don't hate me, but...
I doubt that a car like that would ever have a "weathered" chassis like that. While it looks "realistic," the owner/team would never allow that kind of car to get to such a condition. Drag cars are constantly being stripped down, maintained, upgraded, etc. to keep them in absolute top shape. The sort of car you're building wouldn't be a backyard-built, low bucks weekend warrior, but a professionally built and maintained car, IMO.
Just my 2¢... which you may not want!