Was thinking the same thing, and adhesive can cause the same effect. Look good when wet, shit when dry. It just appears that you've got a sheen of glue on their.That doesn't look like damage, it looks more like the goo was smeared around. I've used it and it left a film like this and WD40 took all THAT off. Washed, waxed and it is good as new.
Also, about the repaint... I highly doubt it. Remember he got it this way because of removing the warning label off the tank. Not many people would repaint a tank and put that warning label over it.