First I thought your car was "greased" foe winter.
The photos are however terrible; it looks like a housewife had a go at your car with a scouring pad.
The washing sponge for teflon does not leave marks, a common sponge for steel pots does exactly what you see. Maybe somebody was in a hurry to clean, or tried to economize buying common steal pots sponges or they just hired a cleaning lady to wash cars.
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