Thor, I hope you never reach a position of authority in a museum. Your proposal is great for a casual display, but not for a historically correct presentaion.
At our museum (Planes of Fame) we FLY them, not just resore them to static. I'd MUCH rather see a flying He 219 than a fiberglass shell. Our annual airshow is in about 10 days and we'll have about 50 WWII warbirds FLYING at the show and another dozen or so displayed static. The fuel bill for the last flgiht where they are all in formation is over $20,000 ... but we DO it to let people see then FLYING.
Our reliability rate is outstanding. We had a Corsair abort two years ago for a wing folding problem but, other than that, no issues with the planes other than flat tires occasionally ... they fly a bit later. Really, the WWII engine and airframes are pretty amazingly reliable.