Woog,
I've never found anything to clean or restore the faces of those guages. I've tried about everything I could think of on old faces I've had, Laquer thinner removes the paint, enamel reducer, 409, Fantastic, Citrus cleaners, GooGone, Rubbing alcohol, you name it. Usually the faces are faded and the silkscreened numbers almost appear to aquire surface rust. Maybe someone else has come across something.
As far as the gasket, if you don't want to order what the suppliers offer, the lock strip used to repair window screens works well. It's usually available at any hardware store in a variety of sizes.

Bob