Hello, I finally managed to motivate myself to make my Jetta 2 Flott again, also because I finally have an engine for it, from a Vento accidenter. Conversion is all P&P. Everything is cleaned nicely and made chic again before the installation! But I just do EVERYTHING myself. I only think all the time about how I should treat the cavities and the underbody. Rust is almost no problem at all on the car for its 34 years, light edge rust only available that I I don’t want to have a fundamental discussion about what’s better now, I’d just like to know how you’re doing it, I don’t think there’s the “Holy Grail” there, which is the all-healing medicine now. I was thinking about fat (fluid film or Maik Sanders) for cavities and everything you can hardly get later. Underfloor I would have thought of wax from the spray cartridges and thus one thing. I protect everything. Of course, it would have to be repeated every few years, but that should be the least problem, vehicle would not be driven in winter anyway. I look forward to your experiences!