My windshield and the rest of the windows are full of the little scratches, those nasty water spots and some rock chips. Is there anything I could do to make them better? The regular Windex does nothing. What are some good products that you use and Work? Would the paint scratch remover work on the windshield? Also, can I sand paper the windows to make it look better? I tried that on my headlights and it worked well but I don't know if it works on glass. I don't to make them look even worse. Thanks for any advices.