The classic Australian caravan problem. UV oxidises the gel coat until the surface goes dull, yellowed and chalky - run a hand over it and it comes away powdery. Caught in time it cuts back to gloss. Left long enough, the gelcoat is too far gone and the panel needs painting.
The standard advice for a caravan is a wax or sealant reapplied at least twice a year - carnauba every three to four months, a synthetic sealant maybe six. On a van that is a big surface area to redo repeatedly, which is exactly why a ceramic coating makes more sense here than on almost anything else.
The sealant around vents, hatches, skylights and edges degrades under UV, cracks and pulls away - and that is a water problem, not a cosmetic one. We check it before we coat anything, because sealing a beautiful finish over a leaking roof helps nobody.
The roof takes more UV than every other surface combined and is the one nobody inspects. On most vans it is years behind the walls in condition, and it is where restoration work has to start.
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