Detailers describe Mercedes paint as the toughest they work on, with jobs running to twice the time of an equivalent car. This is the single most common reason a Mercedes comes back from a cheap correction still swirled - it was not under-skilled, it was under-timed.
The same badge does not mean the same paint. Diamond White is reported as rock hard, while some solid blacks are soft enough to mark easily. Working a soft black with a compound chosen for a hard white is how holograms get put into a car.
Older Mercedes are reported peeling and flaking clear coat, particularly on horizontal panels. Hard clear coat still fails eventually under enough UV, and once it has lifted, coating over it achieves nothing.
The piano-black inserts, grille surrounds and mirror caps scratch far more easily than the panels around them, and they show every mark. They need different products and a lighter hand than the bodywork.
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