Has anyone else used this? I just bought a northeast 2002 Jetta wagon and there are spots of developing rust on the body and in the engine bay. While I had the intake manifold out for cleaning the exhaust manifold and turbo were easily accessible, so I decided to tackle the rust/corrosion on them. Normal cast iron surface rust: The turbo was a little scaly/crusty: I've only had poor results using spray-on manifold paint in the past, and removing the exhaust manifold for this project was overkill for my needs. My hot-rod and jeep buddies have used Calyx manifold dressing on some of their engines, so I decided to give it a shot on the TDI. The instructions claim the best results come from a thorough cleaning, but I didn't find that necessary. I just scraped off any big rust flakes or burnt oil with a screwdriver and some steel wool. Calyx- yes, it actually does smell vaguely "minty", which is a welcome change from all the other automotive chemicals I've been using lately. It's supposed to be non-toxic, which is good since it gets everywhere. It looks like grease, but the consistency is like a rubbery chapstick or a puck of hair pomade. The website suggests using a rag, brush, or fingertip to apply it to metal. I used a gloved fingertip and smeared a tiny amount on the top of the manifold. The metal quickly soaked up the dressing, and I just applied more with my entire palm until the surface had an even coat and the metal quit feeling "thirsty". I did the same for the underside and the turbo, but if you're not as flexible it may be difficult to get full coverage using your hands. Additionally, there are nooks and crannies that are impossible to reach with something as blunt as a fingertip- i.e. underneath the manifold bolts: For those areas, I used an old toothbrush. I also gave everything a once over with the brush to knock off excess dressing and to make sure the dressing was in the pores of the cast iron. The final result looks pretty even (the sun went down so the lighting is different): After I had the intake manifold and EGR back on I drove to the store to get everything to operating temperature. It became evident that the fresh minty smell of Calyx was temporary, as the store parking lot was heavy with the scent of my engine's new manifold stink. It's hard to describe, but the smell is something between the lines of hot (not burning) plastic and boiling play-dough. On the way back I had a few spirited accelerations to spool the turbo, and the smell was mostly gone by the time I returned home. At no point did the dressing smoke or burn. Though you don't normally see the components they do look better- MUCH moreso than manifold paint. And though it's improbable that a turbo/manifold would rust through, they are now protected against any future corrosion. Some have claimed seeing minor drops in engine compartment temps after using the product which may be attributed to the metallic/reflective surface, but those anecdotes are all from V8 guys with a lot more exposed manifold area. Perhaps it may keep a little radiant heat from reaching the intake manifold? For me, the benefit was getting to kill some time familiarizing myself with the back of the engine while my intake manifold was drying out. It's also part of a more comprehensive rust eradication program.