Everyone i know that is involved with cars says its one of the last areas they would want to get into. I have always been fascinated by it though aswell. All you can do is try it i guess
It would definately be a prick of a job stripping the cars, rubbing them back, painting them well and then piecing together all of the seals,interior etc etc., but if you get a contract with a dealership you can make a killing.