The 11 footer deserves a full stripped down restoration. It wasn't designed to serve as a museum piece for decades on end and is now falling apart under its own weight. It not only needs to be repainted but rebuilt as well with structures that can better hold it together for an extended period of time.
And it should be undertaken by a dedicated team that can ensure its restoration to its series production state, at least on the outside. This would include lighting that can work as expected even though that could likely mean using more contemporary means of accomplishing that. I suppose that would be an issue to be discussed in terms of how much of the miniature needs to be kept "original."