Hi Tristan,
Wow, I'm overwhelmed with you restore them back to what they should be so well!! I love using Windex on mine. Anything not connected to a wire and I can separate from the machine, I put to soak in my laundry tub usually with some multi purpose disinfecting cleaner. Have not tried Mr. Clean Magic Eraser, I should. I've used Soft Scrub,scrub brush and aggressive sponges and although it takes out the scuff marks, I find a couple of spots where I rubbed too hard.
Definitely find yourself a Hoover. If you have luck at your Good Will with Electrolux then surely there must be some Hoovers coming in-- hopefully good ones, not a bagless or el cheapo model.
I have a couple of Hoovers but no vintage. Really excited and looking forward to landing myself a Celebrity or Guardsman power head canister and Decade 800 upright.
Welcome aboard!! I'm not a full paying member yet, but John, the "King of Hoover" could probably help you out.