My 1996 Bonneville (black) loves to water spot more than the other black cars we have. Any suggested solutions?

dry the car after you wash it, you probably have hard water like me. When was the last time you waxed it and what did you use?

If washing, with a quality car wash soap, and then drying does not solve the water spot problem the next step would be to use a wax. If you do not have a wax that is also a cleaner then I would purchase one and give it a try. If the cleaner wax does not remove the water spots then the only course left to you is to polish the car then wax. A good polish will remove the water marks. The problem is the water marks have imbedded themselves in to the clear coat and polishing is the only way to remove the water marks. Good luck and let us know what happens and what you did to remove the water marks.