Spent a couple of days sweating my butt off trying to remove stains from the awning after a week of camping. Not sure what it is... It could be from tree sap. And it's pretty much all over.
I've tried Camco Awning Cleaner, Armor All cleaner, Goo-B-Gone, Undo It (for removing the sticky residue from tape and bugs or tar or sap), Tilex Mold & Mildew remover (even tho it's not mold and mildew on the awning). The stains are not sticky and the sap is gone, but the brown patches remain and I cannot get them out!!!