Mr. Clean Magic Eraser works very well. Works great on your awning too. Remember, make it wet an wipe ... don't scrub. Wipe off with a dry cloth. If it's still there, simply wipe again. Don't scrub. Mr. Clean Magic Eraser works on everything in your camper. We go through a few dozen of them every year, just for the camper. They are great on the wheels too! Not to mention your automobile and those road tar spot. Now, granted WD40 works great on those road tar spots, but follow up with a Mr. Clean and you have the best of the best!