What can be done about white water rings?
Any time you see a whitish, milking looking blotches or white ring marks, this is an indication that the finish has deteriorated as evidenced by the moisture that has impregnated it. We’ve heard toothpaste can help with rings, but we have never actually tried it. Always test anything in an inconspicuous area before putting it on a large visible area. Most of the time it takes a professional to remove these rings successfully.