What a UV index of 12+ means for your paint

The WHO classifies UV index 11+ as "extreme." Réunion regularly exceeds this, particularly in summer months and at altitude. Clear coat is UV-stabilised at manufacture, but that protection is not permanent. Sustained exposure at high UV levels accelerates oxidation — the process by which the clear coat breaks down at a molecular level and becomes visibly hazy, chalky, and dull.

What wax does — and why it fails

Carnauba wax creates a sacrificial layer on top of the clear coat. It absorbs some UV. It provides a degree of water beading. In moderate climates, it provides several months of effective protection.

In Réunion's combined UV index and coastal humidity, wax degrades in weeks. Salt from the air attacks the wax layer. UV radiation breaks it down faster than in temperate conditions. Rain strips what remains. Six weeks after application, most carnauba waxes are providing minimal protection.

What ceramic coating does differently

A ceramic coating does not sit on top of the clear coat — it bonds chemically to it. The result is a layer with a hardness rating significantly above wax or paint sealant. It is not sacrificial in the same way: it does not wash away with rain or degrade under UV at the same rate.

The hydrophobic properties — water beading and sheeting — persist for years rather than weeks, because the coating has not degraded. Contamination adhesion is reduced because the surface chemistry actively repels it rather than merely slowing it down.

Is ceramic coating worth it in Réunion?

The question is really whether re-applying wax every 4–6 weeks indefinitely is worth more than a coating that lasts 2–5 years and requires only maintenance washing to preserve. In Réunion's conditions specifically — where the environment degrades paint protection faster than almost anywhere in metropolitan France — ceramic coating is the rational long-term choice.

The preparation required (wash, decontamination, correction) is the same whether you're applying wax or coating. You're spending that preparation time either way. The difference is what you get from it over the following years.