I was on the judging team that judged Jim Boyd's car. It was very well done, with original blue dots, assembly line battery and a lot of very rare parts. I don't recall everything we deducted for, believe most of it was workmanship/condition type of things. Not really my place to say exactly even if I remembered. Best way to learn is by observing original cars and parts. Then go to shows, look at more original cars, then restored cars, then get involved in the judging to learn the differences.