71 Twister up for adoption

I can’t help but wonder if the problem wasn’t caused by the fact that I kept it under a car cover that was moist underneath much of the time. I went thru at least 3 different covers and each did the same thing. The trees in my yard drop a lot of junk and a cover is a necessity. I now have it under a cheap carport-like cover from Harbor Freight - wish I’d had one 10 years ago.