I have seen a few references to clear film paint guard on the VW Clubtouareg forum in the Aus/NZ section.
A good friend of ours took his new Tourareg across the Simpson last year and was a bit concerned about scratches so did some research and came up with a locally available product that applied with a paint roller.
After the trip it just peeled off like film.
He said that it did protect from scratches and even stone chips.
From memory the product was promoted to protect new vehicles or boats when transported before delivery.
I don't have the name or cost to hand but can find out if you are interested,