A Mothers PowerBall and/or PowerBall Mini will make polishing the wheels a lot easier. I've seen them locally at Wal-Mart and auto part stores like O'Reilly. Mothers makes a decent aluminum/metal polish as does Flitz, Wenol, etc.

If you don't want to clear coat them Zoop makes a sealer (expensive, but less than having them cleared) that is supposed to last longer than most products.