Back when I used to run a Video Game arcade, we'd use a dollar bill to clean contacts for joysticks and buttons. Very low abrasion and high utility as far as cleaning electrical contacts. Might be useful for the final buff.

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Codifex
1981 240D ChinaBlue (Got her running with a donor engine.)
1983 300DTurbo w/sunroof.
1984 300TD manual sunroof. (Electrical Gremlins)