What are your opinions about products such as these? http://www.ruststopnorthamerica.com/ruststop-kit.htm#RustStop%20RS-4 The basic concept seems sound to me and it's similar in practice to the passive anodes that you find on saltwater boats. It's supposed to keep everything on the chassis down to the last nut and bolt from rusting, which is more than can be said about Zeibart and the other similar products the dealer pushes on you at the time of purchase.