Carbon is neither metal nor plastic — it’s a composite: a weave of ultra-fine carbon fibers saturated with epoxy resin and cured into shape. These two components, fiber and resin, are exactly what determine how a carbon part should be cared for. Carbon doesn’t rust and isn’t magnetic, simply because there’s no metal in it. But the resin beneath the clear coat reacts to sunlight over time, and a deep crack in the fiber can’t be straightened out like a dent in a steel panel — often the part needs to be replaced entirely. The three sections below are built around exactly these material properties: washing, surface protection, and seasonal care.
Washing Carbon Parts
On the outside, a carbon part is a woven layer sealed under clear coat — glossy or matte. It’s this clear coat that comes into contact with water, brushes, and chemicals during washing, so the same principles apply here as with any lacquered body surface.
- Wash with a soft wash mitt or use a touchless method to avoid leaving micro-scratches on the glossy weave — they’re more noticeable here than on a flat painted metal surface.
- Use a pH-neutral car shampoo and avoid harsh solvents — they can damage the clear coat that protects the resin underneath.
- Dry the part with soft microfiber rather than blasting it with hot air up close — again, to avoid scratching the clear coat.
One clear advantage of carbon here is that it doesn’t need “anti-corrosion” washing logic — there’s no metal in the part to rust under leftover road chemicals. But the clear coat and any protective layers underneath still need regular washing: dirt and salt don’t dissolve the resin, but they do speed up wear on the protective layer on top.
Surface Protection
Carbon’s main enemy isn’t moisture or salt — it’s ultraviolet light. The epoxy resin that binds the fibers together and forms the visible surface beneath the clear coat gradually yellows and clouds under the sun. This isn’t a material defect — it’s natural aging of the resin, the same thing that happens with other polymers over time.
This is where the logic of protection comes from:
- UV-filtering clear coat. This is the base level of protection that should be present from the factory — it slows down the yellowing and clouding of the resin.
- Ceramic coating. In hot climates, it makes sense to apply an additional ceramic layer on top of the clear coat — it creates another protective barrier against sun and chemicals.
- PPF protective film. Polyurethane film is another option for hot climates, shielding the surface from both UV exposure and small stone chips.
If the clear coat on a part has already clouded from sun exposure, the situation can be corrected with polishing followed by applying a protective coating — this is a standard measure for restoring the part’s appearance.
One important point: genuine carbon is never painted a solid color — that would defeat the whole purpose of choosing the material in the first place. So any protection applied needs to be transparent: clear coat, ceramic, and PPF film are all applied in a way that leaves the weave visible.
Protection matters even more because repairing carbon isn’t a job for a regular body shop — it requires specific materials, tools, and experience, and a deep crack often means replacing the entire part. It’s simpler and cheaper to prevent damage in the first place than to fix it afterward.
Seasonal Care
Carbon has a natural advantage over metal here: winter road chemicals don’t cause corrosion, because there’s simply nothing in the part to rust. But that’s no reason to skip washing in winter — salt and grime still break down the protective clear coat and coatings on top if they’re not rinsed off regularly.
In summer, the opposite problem takes center stage — intense sunlight and the corresponding risk of the resin yellowing. That’s precisely why, in hot climates, it’s worth adding a ceramic coating or PPF film on top of the standard UV clear coat — this is a direct recommendation for climates with strong sun exposure.
As for temperature swings between seasons: carbon barely expands when heated and doesn’t conduct heat the way metal does — so sharp temperature changes alone don’t put the same mechanical stress on the part that they would on steel or aluminum panels. That said, this doesn’t remove the need to keep an eye on the condition of the clear coat and protective layer throughout the year, and to consult specialists promptly if a crack or chip appears on the surface — before the damage delaminates the material any deeper.
For more on what carbon is made of and how it differs from Forged Carbon and ordinary wrap film, see “Was ist Carbon?”. RNG Design produces carbon body kits through a full in-house cycle — from design to series production — with its own manufacturing and TÜV-standard certification.
