I stood in the open bomb bay of Enola Gay when it was being restored at the Smithsonian’s Paul Garber Facility c. 1993. Very powerful moment for me.
The technician working on the skin said that the exterior surfaces were covered in pits but Enola Gay’s pits would be as shiny as possible. They also said that they restored systems including engines to original condition and if necessary used worn out original parts, including gaskets and orings instead of modern replacements. They said they would prefer the oil leaks.
I went to see “Box Car” that dropped to 2nd bomb.
Its in the Airforce museum in Dayton OH.