Hi. This forum is the greatest thing since the invention of the swimming pool. I've had great advice from here. We bought our home last year, which came with an old but structurally sound in-ground pool. It's age is showing, though. I'm posting to ask how I can remove rust stains and other marks from the surface. Here's a photo. https://photos.google.com/share/AF1...?key=NFpId2pUSTQ5c0FYRjU2TkNRV2otX2tXUy0zUHR3Any suggestions? Do I have to drain it and repaint it? Hope not. Thank you!