My Mustang GT White Convertible w /30K started turning yellow around the bumper's first and now is spreading all over the car. This car has been a garage queen from day one and has never been driven in the winter. Is anyone else having this problem. My Ford dealership can't explain it.

 

I would really like to see pics of this (can't believe that). Sounds like a paint application issue, either the batch of paint has an issue or the application to your car does, but usually problems like this show up sooner then now. What products are you using to wash/wax it? Definitely need someone with autobody expertise to chime in, in fact if you know a good one in your area I would have them look at it.

 

Without knowing the condition of the paint it sounds like a serious detailing weekend is in order.