Car foil and paint problems

Hello, I’m new here but in my perplexity I absolutely need help. The suffering story of my little Peugeot starts in the summer of this year. Due to the very intense sunlight,so my assessment, the others started to jump up. It became increasingly worse. So we decided to take it off. It was a very unpleasant work for days. We had to remove the glue with special cleaners. Then the car stood there. But after e In those days small brown dots appeared. Slowly a layer of foil splintered off. If this was gone, you could remove the dots. Now in the cold, the car skins really. What can I do? I would like to get rid of total beginners and repainting, because I already had a cost proposal made and this one didn’t look beautiful. Thank you very much in advance!