I use Wash /ALL Wax All (
www.washwax.com) It is waterless. After every day of travel I clean the front of the coach. I even do the windows with it. This product is approved for use on aircraft by Boeing. No problems with product causing crorrision on metal, brightwork or windows (glass or plexiglass). Headlight lens tend to have a problem. On our coach we use this product for 5 years and o clouding has occoured. If we go thru an area with soot, dirt, mud I rinse the coach down 1st to get the grit off, then use the Washall. they have an interesting tool to apply prodct with and buff. A gallon usually last over a year and I do 2 cars, 40 ft coach and a 21 ft boat. NO, I'm not a dealer, distributor, just a pleased user.