What could be the story

I think anything is indeed possible. We went to school with a friend who had a 1969 Road Runner. Big deal. But it was plum crazy. There was no evidence anywhere that it had ever been repainted and it also had the correct color code on the fender tag. Although the paint was needing help, it was purple everywhere. The trunk, under the seats, behind the door panels and even under the dash and on the inside of the firewall. So yes, I think a color change is certainly possible.