I started cleaning the fan and fan housing using soapy water, Scotchbrite maroon pads and Formula 409. My fan and fan housing have pitting and a really tough coat of dried oil/grease so I really had to scrub. The Formula 409 helped cut through the oil/grease. The leading edges of the fan blades were especially tough. I spent 3 hours on the fan and 1 1/2 hours on the fan housing. Getting better, but not done yet. I have a can of Eastwood Diamond Satin Clear on the way so when I decide I'm done cleaning, I can shoot a couple coats of clear as was recommended in a PP forum thread from 2021.
Cleaning set up:
Before cleaning:
After first cleaning session: