Can you show me a picture of a RUSTED penny?

Not easily. Except for 1943 wartime cents, US pennies are made of either bronze or copper-plated zinc. Neither of those metals is ferrous (iron) so they'll tarnish but they won't rust in the usual sense.

1943 cents were made of zinc-plated steel so they can rust when the zinc wears through. They're kind of silvery where the zinc coating is still intact, and typically rust-brown and rough where the underlying steel has started to corrode.