During a weekend trip looking for the perfect 300E, my friend was telling me about an infomercial he saw that morning. They had a variety of Prolong brand auto car (exterior) products that sounded pretty darn special to him. I think there was a wash, a wax, some window cleaner, and an engine cleaner in the package. It almost sounded like you were putting a layer of Teflon on the vehicle. I did not see the special and know nothing about the product. Has anyone here heard of these products? If so what are the profession/experienced opinions of them.