Swirl marks are a physics problem: how desert dust scratches clearcoat
Look at any dark car under the sodium lights of a petrol station forecourt at night and you will see them: fine circular scratches that light up like a spider web. Those swirl marks are not caused by driving. They are caused by washing — specifically, by dragging desert dust across the paint. UAE dust is not soft household dust; it contains a high proportion of quartz silica, which is harder than clearcoat. Wipe a dusty panel with a dry cloth and you are effectively sanding your car with very fine sandpaper.
Understanding this mechanism changes how you evaluate detailers. When you compare vendors, the questions that matter are not about the shine at handover — anything looks good freshly dressed — but about process: do they pre-rinse, do they use grit guards, do they dry with plush towels or a blower rather than a chamois dragged across the surface. A detailer who can explain their wash sequence usually gets the harder stuff right too.