You know, I always had the same feeling. Restore, or leave original.... What a dilemma... I made my decision based upon rot... My rigs were pretty much rust free , no holes, so it was obvious. But the ones with dents , holes , etc... I took them to restore and started a new era for them.
Looking at yours, I believe you may be the last of the originals.... I would be in a dilemma on that... I suppose with the story and the people involved, put a clear coat on it and call it perfect..
Beautiful rig and beautiful story. One of the best.