Rust on exterior, from inside drip rail/rain gutter.

The screw that is rusting is covered by the drip rail. There is no getting to it other than ripping the rail off, which ain't gonna happen.



It was getting a little dark so you can't see, but the rust streak comes out from under the driprail, not from the driprail. Most of the driprail is caulked on the bottom, this part isn't (about 4 inches).