I've NEVER been a fan of chrome wheels, no matter how it's applied. I work for a car rental agency, and it's very common to see chrome wheels covered in surface rust each time a car's returned, especially in damp weather. Chevy Impala's, Old's Alero's, Ford Taurus's, Pontiac Grand Am's and Grand Prix's.......they all rust right from the get go.
I'm not sure what type of material is used, but I FAR prefer the standard wheel covers used on the Intrepid SE, especially the design used from 1998-01. Sporty, with enough sheen in the finish to give it sparkle. They clean effortlessly, never rust or stain, and look terrific in the sun.