Unfortunately, in winter my moose was unsuited….. This thin fold or envelope at the bottom of the threshold was covered and the rust protection damaged. At these places it starts to rust… It has already been months ago. The Tr*ttel used a jack, in which unfortunately these “rubber plates” were missing. I was already angry at that time, but the winter ices had to do it. I can’t accept damage claims. ? Or first primer/basic paint (this white stuff before you paint)? What does this fold look like for you? Is actually a rather weak spot when you see how thin the sheet is there, and what it theoretically has to endure.