it works wonders its a liquid wat you brush on the wheel and it comes up a gem every time.
i take my wheels off once a month and give them a proper clean inside the rim as well and then use turtle wax car wax polish after i dry them.
but the turtle wax wheel cleaner kit comes in three different types (e.g. alloy,chrome,steel) so get which one suits and buy the wheel protecter kit also which has wheel protecter spray and wheel polish inside.
buy the three below and you will be very happy with the results.