I don't recall my reactions to the exterior shots of the B-52 in Dr. Strangelove but the interior shots didn't look like any B-52 that I ever saw, and I saw just about all of the C and D models.
That's true, I read that Stanley Kubrick didn't have any official support from the Air Force for the movie, all interior shots were just movie studio mock ups sets based on what they thought would work for the movie. Slim Pickens as pilot was a last min stand in as Peter Sellers was to have also played that role along this his other roles but had some kind of injury that prevented it. That movie is one of my top five all time favorites.
Le