Hello,
There is a product sold in the US called DryWash & Guard. Its sold through MLMs ..small independent distributors. I love it , having a white van...I use it everyday. No need for water, just pump up the bottle and spray, and wipe off. The product encapsulates the dirt and you wipe it off. It gives the whole van a nice shine. I'm starting to see many versions of this product now, selling where you get auto detail supplies.
Jon