Very simply put, polish makes it shiny, and wax keeps it shiny.
There are "cleaner waxes" that claim to do both, saving you a step, but I've always preferred to polish and then wax.
I've had good results with the Starbrite, as well as all Meguiar's products.
3M products are great also, in fact they recently bought out Meguiar's, which had been family owned for ever.
(Message edited by rio_sanger on March 04, 2009)