shameful treatment of it. it should be indoors and away from the sandblast effect of sitting in the desert... on sand
It's not sitting on sand. It's sitting on hard-packed dirt which is so hard it can't be dug with a shovel. it has to be dug with a pick.
Under the dirt (and sometimes on the surface) is caliche: A sedimentary rock so hard it has to be dynamited to break it up. That is one reason why so many planes are stored out in the open in the Arizona desert: they never sink into the ground.
The plane is sitting at the Pima Air & Space Museum in Arizona. Arizona has dust storms, not sand storms, so there is no sand-blasting. The museum is literally across the street from the USAF 309th Aerospace Maintenance and Regeneration Group.
The biggest cosmetic problem is the sun bleaching the paint.