Renegade Spot Assassin is a safe, non-toxic and non-abrasive water spot remover that targets and eliminates tough water spots on any surface in seconds. If you live in a place where it rains constantly, it’s foggy in the mornings and you notice water streaks on your windows as you start to drive, your city water is high in calcium and alkalinity, or you park by an automated sprinkler. Your car paint is at more risk than you think! Because of the large rich concentration of minerals in the water that takes place when the water dries, called “Water Spots” due to its visual characteristic.