Thats really interesting, i am currently restoring a car, it was stored for a long time without any care, and lots of uv rays, then i stored it under a heavy duty cover, i have started preparing the car for paint. I can remove original paint with a sharp cutting blade, this is a first, makes my life easy,
Sorry i cant help with your delema, maybe remove all paint on that panel, it will need removed to add any type of paint in the future.
Where these cars e plated, as this seems pretty secure, but isnt on inner panels i believe? Confused!