My white '97 Lesabre is doing the same. Paint has flaked off, particularly where the plastic is painted (the lower parts and molding). I have just touched up the gray primer spots with appliance paint touch up. Due to the miles on it, I probably won't be doing any major paint job. Also have a silver '97 and the paint has not flaked off. I think the previous owner garaged it, but the sit outside here. I am fairlys sure the white one has never been garaged.
My sister has a white '98 Olds Eighty-eight and the paint is flaking off.
I just recently repainted the silver on the plastic centers of the wheel hubs. They look much better.