and not too much rust remove otherwise it works not correctly. It sounds paradoxical, but is, Keyword: Fertan - FE2O3. A little rust is required for the chemical reaction and to creep. Also important is the air humidity of the reaction, ie preferably in the evening after sunset, at not too low temperatures. Even the double seam of a wheel well, you can keep it when it blooms already. The important thing is that Fertan really back and can crawl, where the rust is produced on the car. So, for example, before a rain ride in all relevant places spray that you read to his vehicle in the rust forums. If it is repeatedly transported by the condensation on the bodies reaches the otherwise only the Karrosseriebauer is often much help. How me a trouble TÜV has confirmed as Parker lantern over 12 years and 170,000 km). I spray it with the new preventively before the winter season to all double folds and rubber edges that are otherwise known to be at risk. So then I do not care whether the automotive type body filler is not 100% leak-proof. Even otherwise, household or hobby (saltwater) in use. One can not prevent everything, but certainly delay to the planned service life.
Quiet times problems affecting tire change, if you can spray a little time down. Hose clamps, paint pops, nuts, exhaust system, it can be found after winter always something .... As shows the difference to wax and underbody protection, which I sense look at the splash zone as necessarily. At the other places without mechanical stress rather air and only Fertan if necessary. If you have something does not get caught, you can see it after a few weeks. With a covering coating it takes a while until visibility to rust bubble, since the damage is usually greater.
