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For your wheel wells and undercarriage, use something like Salty Captain Chassis Flush. This stuff is excellent at neutralizing road salts and leaves behind a light protective barrier to help slow down corrosion. I pair it with the Tool Daily Undercarriage Pressure Washer from Amazon, it’s great because it includes a foam cannon attachment that works perfectly with the Salty Captain solution.
I usually pull all four wheels off and coat the wheel wells and undercarriage thoroughly. While the undercarriage soaks, I brush out the wheel wells, then use the wand again to rinse everything clean.
With the wheels off, I spray them down with a strong all‑purpose cleaner, scrub them, rinse, wipe them clean, then give them a good polish and a layer of ceramic coating.
For the paint, the process depends on condition, but for the best results I start with a proper hand wash, then use Griot’s Garage Iron & Fallout Remover. If the paint still feels rough afterward, I go over the car with a clay bar. Once the surface is clean and smooth, I do a light polish to clean up any swirls or winter‑induced scratches, then finish with a layer of ceramic coating.
I also give the door seals some TLC with SONAX Rubber Protectant (GummiPfleger). This stuff is insane; I tried it a couple years ago and the weather stripping on my M340i loved it. It plumps the rubber back up like it’s getting lip filler… LOL. But seriously, it keeps the seals soft, prevents freezing, and stops them from drying out.
This is essentially my yearly post‑winter reset.
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