Acid Rain Remover Glass. You can find clay bars at reputable car care retailers and popular hardware stores. Applying a coat of wax regularly is also highly recommended to avoid spots on your paint.
Removing Existing Rain Spots. Always test ProClean. Acid Extract as much as possible and mix with a little water.
Pour the solution into a spray bottle.
Remember to always thoroughly dry your vehicle including windows after washing it. This is a chemical concoction commonly used on glass but can work on painted surfaces as well. Shake bottle of ProClean well before using. Acid Rain Removal on Glass.