If I recall there was some bulletin or even recall on this - or similar to this (some trim strip expanding in the sun shine/heat and rubbing against the body).
Typically, there would not be an insulation or protective tape between the body panels..I would think. There is plenty of plastic on car seats, carpets, etc. inside the car and some styrofoam door dent protectors, for car or rail transporters. Other than that, they would "heat shrink" the whole body, like they do on boats, when they are hauled across the country.