01 ls sport wheels leaking air from chrome

[jcayer]

about a year ago I had a problem with a 17" sport wheel on my lincoln ls. It would leak air to the point I would have to put about 10-12 lbs of air in a week. lincoln told me it was my tire and firestone kept telling me it was my rim. so I took it to another lincoln dealer and they said the rim is fully coated with chrome even under the tire and it is corroding from moisture. well after that my lincoln dealer said oh ya lincoln designed a new rim because of that, and it no longer has chrome under the tire, so they ordered me a new rim its great no more problems with that wheel. MY NEW PROBLEM. Now my other wheels are doing the same thing. my 4 year warrenty ran out in august 05 and I have 49,900 miles on my car. The dealer said their is nothing they can do. anyone have any suggestions what I should do. thanks for the help.