Other than painting over the pump with white paint, I'd just leave it as it is as I agree the off-white patina just adds more "C&V character" to the pump. Be careful using stuff like rubbing compound and cleaners with solvents in it, as the old plastic might end up getting damaged as plastics back then weren't very resistant to chemicals. I'd rather just use the mildest cleaners/polish on such old plastic items like "Pledge".
Last edited by Chombi; 12-19-13 at 06:36 PM.