Cleaning and Polishing Vintage Formica Tabletop?

This is not really about a repair, but a question about cleaning and polishing an old '40s style Formica table top. It is yellow with a cracked ice design, some of which is worn away. It also has a painted fish design around the edges, which shows some wear, but I do not want to repair or replace the table top. It's looking more dull than when I bought it and I'd like to clean (if necessary) and polish it without causing any more wear to the Formica or the painted design. Anyone?