Well, not a lot of progress from me...
I bought a cup wheel to machine the old flywheel and tried it out on some really rusty discs that were laying around outside.
Better, I didn't go far enough to make them usable, just a proof of concept.
They look like a really rough surface but they are actually quite smooth to the touch in the center.
I also tried out some of the suggested aluminum cleaning methods.
Before:
And after:
I also had the purple stuff laying around so I tried that for comparison.
Both seemed to work but the Zep purple took grease off better and the eagle cleaner brought shine back better. I think I'll use both on the transmission but I want to wait until It's warmer and use the pressure washer outside.
Also in new developments, my brother bought this for 1400$!
It runs fairly well and only has a few dings, dents, and scrapes, also looks like very little rust anywhere.
I think he got a steal of a price! I'll try to talk him into posting about it as he goes.