I just received two generators back from Steve Blancard, ndnchf user name on the Ford Barn. He was great to work with and did a very nice job on each of my generators.
I had him go through two three brush generators, a high output unit from the mid thirties (this particular one was from 1936) and a very late three brush generator. Both of these generators had been sitting on a shelf for decades with the rust and grime typical of cores. Attached are pictures of each generator during and after Steve finished working them over.
The high output unit:
The late three brush unit: