Coastal home owners, boat enthusiasts or even photographers will be very well aware of what damage salt water can do to glass. When you get that new window, balustrade, camera lens or windshield the undistorted view will only last a short time before the salt water starts to leave permanent etching marks on the glass. That milky appearance becomes a reality before you know it. You can slow down the process by regularly cleaning the glass panels, but after some time you will start to see damage building up.