DAMIFINO. When I first looked at the picture, I thought it was plastic, but the website said metal. They were there, so I accepted it was metal and deduced it would have to aluminum if it were indeed metal.
The fire could have been considerably hotter along the fence line because of increased vegetation that naturally grows there.
Thin aluminum like a can will indeed turn white but I've melted thicker pieces with a torch and it just sat there and did nothing until it suddenly became liquid, no warning, with a paper thin "skin" over it. The "skin" was not thick enough to keep it from flowing.
Also an aluminum can is a different alloy than a sign would be made from and aluminum age hardens just hanging around.
I agree the lettering surviving is odd but that could be due to the rapid heating or the coloring being absorbed by the "skin".
Besides, as we all know, Texans never lie.
