We purchased (and then won another) WashWaxAll dry wash kit at the Gillette Rally. I used the first kit on the BH and two cars and am very pleased with the results. I gave the second kit as a gift and received similar feedback from its' owner. It took some time cleaning the RV and vehicles due to bugs, blemishes and wax build up from previous products, but I was pleased with the results. I put a second application of the product on my BH and vehicles before the winter and noticed that it went on easier, I used much less product and it appeared to have a glossier shine.
Guyla and Don, the vendors at the Gillette rally are very nice people. They suggested using the concentrated form of product since it saved a few dollars and was easy to mix....they were right. I used a ladder to reach a few high points on the cap during my first application, but didn't see the need during the second application. I was able to complete with second application from the ground using the pole, product and application pads in less than 90 minutes (your time may vary).
I also managed to break the extension pole that came with the kit (I believe it was manufactured by Shur-Line). I contacted the Wash/Wax company owner and sent him a picture as requested....he shipped me a new pole within days and without any charges. Great customer service and the company advertises a 100% Money-Back Guarantee.
This kit is not cheap, however the various included wash/wax solutions and application devices are quality products. I haven't had to restock any of the liquid products yet, but I did go through most of the Belly Degreaser while removing the bugs. I also thought the Bug Buster addition to the kit was worthwhile.
There are several similar products on the market, but I'm not sure how they are priced/packaged...so some comparison shopping might be in order. You can purchase the entire kit or any of the components individually from the Wash Wax All at their website listed below. They also have a few videos which include RV application of the product.
http://washwax.com/