[meford4u]

I bet I can guess how this happened. I see it occassionally in the paint booth.

If an inexperienced person is sanding dirt out of the prime and sands down to the metal, past the ecost, it needs to be reprimed before painting. Looks like it was never done. Even if the car is just clear coated as the primer and then basecoat clear coat again, that would be fine. But a single trip thru the spray booth will result in this.