Thanks TNCgal, that's right on the money. And I will ask a beautician friend of mine for the peroxide stuff. I'd love to display this thing, since there's no damage except the stain.
I bought a beautiful set one time. It was a Gaudy Dutch cup plate and handleless cup. There was no saucer. I always thought the cup plate came before the saucer. Just a hypothesis of mine.
Cup plates were normally glass and about 1/4" the size of a saucer.Some EAPG cup plates can be very valuable.I have never heard a peice of china described as a cup plate but I am a pretty much just a bottle guy.Doug