It turns out that running the die grinder for 2 hours will cycle the compressor enough to heat up the garage several degrees.
Before picture, for reference:
Notable finds include stamping “CHEV A SAE H 71" for Chevrolet A-body SAE (dunno about the H) and 1971, and...
They must have sold these to Lotus, too...
So anyways this is most of the way done, final clean-up will be in the morning then it’ll get some primer. The other side is prepped similarly, no picture there though.