its a teflon polish that is applied to the paint work and gives it protection from minor scratches (very minor) bird lime... road salt etc...
its is good stuff but the dealers charge £300 for it....it takes a couple of hours to apply and only cost £30 for the kit which contains the special polish, (which only half to 3/4's is used), special shampoo that you have to use to clean the car with and some spray you use on the carpets and seats, (scotchguard, like when u buy a new carpet)
it is good stuff and helps you keep the car clean, but itsover priced and you really could do it yourself.