What did you do to your Class A MH today???

After fixing my power washer (one allen wrench and 4 new O rings) I decided to try to wash off the black crud that looks like mold from the '84 Holiday Rambler. It hadn't been washed in years. It did a good job of getting it off and surprisingly, some things that were black turned white, and some things that were white turned black. It really made a difference on the fiberglass and plastic and made the awning look like new, too. I love my power washer. It isn't so powerful that it sprays off the paint or harms the surface. Just does a good job cleaning.