1958 Mercedes Maroon paint original and getting thin. It got badly water spotted (should I upload photos for better advice?) and I'm not sure how to proceed. I read a little about using a vinegar spray to see if it would help. I've tried a couple of real fine polishs by hand to little effect although it seemed to help a little. Trying to avoid a re-paint on an otherwise original car. Water spotting occured from the car being left out in the rain and dried by the sun, an accident since I keep it garaged otherwise. I'm thinking I need a real pro to try to fix this but have been unable to find anyone I really trust. Advice sought and appreciated.