I have black streaks running down the side of my MotorHome. What causes them and how do I get rid of them without ruining the finish?
Black streaks are caused by the roof being dirty and rain or moisture carrying the dirt down from the roof onto the sides of the coach. You can remove black streaks by making a past of water and baking soda and scrubbing with the paste. Be careful not to scratch the surface. Commercial black streak removers may work well depending on the severity and makeup of the grime. Some MotorHomes have gutters that help a great deal in keeping black streaks away.