Krylon makes a number of products that are not only beautiful, but
durable as well. Rust Oleum also has an amazing array of products to
choose from. On one commercial, I saw them paint a plastic chair even,
and get this - THE PAINT WOULD NOT COME OFF! I think this would be the
best bet, say, black, gold, blue or yellow. Then, use some crayons or a
chisel to make some squiggles in the paint, it will look JUST LIKE
marble when you are done! I saw it on this old house once, so I know
it's true.