Quote Originally Posted by JLC View Post
Certainly makes it less likely to be a simple surface marking caused by discolored water or newsprint. But something more permeable (like a sharpie marker) could leave marks that may take several sheds to completely fade away. It doesn't look like any scale rot I've ever seen, but it could be some weird fungal issue.

The pictures are too small, and not nearly enough info has been given for us to do anything more than toss out random guesses. I just figured I'd throw out something I hadn't seen anyone else suggest.
I had no idea that a marker could do something like that. I guess you learn something new everyday Hopefully we can get some closer pics or someone with previous experience can comment.

Regards,

B