Its school holidays.. don't even worry about this retard. Kid has probably never owned a car.
There is no such thing as stupid questions, Only stupid people.
I,ve used the nanolex products .. I agree, some are top notch, especially the one you mentioned, but hey ... 3 years on the car, are you sure? Even their site states 18 months http://http://www.nanolex.de/en/nano...-paint-sealant which is hard to believe, .. Have you actually tested it lasted 3 years, as I wiped of mine after 2 months .. Not much was left.