Hi all, so as I mentioned in my earlier thread, we finally bought a lake home. It came with a great all aluminum dock. It is 48 feet long and varies between 4 and 8 feet wide. Problem is large portions of the aluminum decking sections are stained a very dark brown color. The pressure washer barely makes a dent in it. I'm wondering if anybody has an idea of how to get it back to it's original aluminum look? Thanks for your thoughts