it's not just Ford. All the domestic car makers in the late 80s and 90s had a lot of trouble with their paint flaking off on the hood, trunklid, and roof.
Just take a look at any Chevy or Dodge made in the era and it's the same way. I always figured it was something goofy like environmentally friendly paint formulas or something. I've got nothing to back that up though.
BMW did something similar using some sort of biodegradeable interior adhesive, so most BMW's manufactured in 1994 have their cloth coming loose from the door panels and other interior parts.
My blue 1990 is mostly ok, just has a patch of bad clearcoat where the fender meets the hood, about 3" long and 1.5" wide. But it appears to have been garaged most of it's life.