Use Autogym High Definition Wax as that coats the car with wax rather than cuts into the surface of the paint to give a shine. Expensive at £45 a tub, but cheaper than a paint treatment. Of course the salesman is not happy because he has missed out on three opportunities for commission that might have netted him £750 - £1000 altogether. GAP insurance bought from a dealer is usually 2/3 commission.