Caravan equivalent of Wax It Wet?

For some time we have been using Turtle Wax product "Wax it Wet" on our car.  It leaves it sparkling and in our humble opinion is great.  Which set us off thinking, is there an equivalent product for use on caravans?  We have a Diamondbrite coating on our caravan and there is a product (Conserve?) in their welcome pack which basically says "add 25ml of product into a bucket and then apply with a damp sponge.  Have never tried it, but thought a wax product would be preferable. Anyway, any ideas would be greatly appreciated