We have an aluminum siding travel trailer. We can't get rid of the black streaks. We have tried the LA Awesome cleaner with a pressure sprayer and had no luck. Any suggestions??
Wash your camper several times, for several months using a good wash and wax soap like Meguiars, Turtle Wax, or Mothers. You need to wash out the dirt and grime that is causing these blacks streaks running down your windows, gutters, vents.
To wipe off black streaks, try Meguiars Waterless Wash and Wax. Mothers also has one. FW1 also has one, but have not seen it Wal Mart. These waterless products have wax in them.