I am restoring my 73 convertible, and will be having repainted. I know very little about anything paint related. How many quarts of paint should it tkae to paint the whole car, including the door jams, and possibly the inside of the doors(what the door panels cover up)? I have decided to go with a completely different color than before. Would I save money purchasing the paint myself, and then haveing a professional paint it? I would appreciate any info that anyone might have on this subject.