I'm not sure if this has been discussed yet (no search hits), sorry if it has. I have an 07 with the 18" chrome rims. Needless to say the winters in Buffalo are not very forgiving. I try to keep it washed as much as possible. I noticed that the rims are starting to bubble on the outer edges and almost a rust like appearence on other parts. Is this something warranty will cover or is there anything I can pick up at the autoparts store to "re-polish" them when spring hits. Thanks in advance for the help!