An update:

I took the handset of this phone, washed it in warm soapy water, then wet sanded it (carefully by hand) with 1000, 1200 and 2000 grit waterproof sandpaper. I could not find 1600 or 1800 even at the car paint shop.

It took me around three hours all together to cut through the discoloration to get to the original plastic color. After that, I hand polished with Novus #2, which did a great job of polishing the plastic, but when I look at it under a strong light, I can still see some microscratches. I think that I will order a small bottle of Novus #3 and use that, followed again by #2. It should be perfect then.

One question now... Is there anything that I can do other than keep the phone out of sunlight and flourescent lighting to prevent it from discoloring? I want to preserve these for future generations if possible.

Thanks again!

(Photos to come...)

Joe

Real comms took 200lb teletypes, hand keys, sounders, operators and cranked phones!