Let the paintr make rust…Car now with paint mist layer

Moin, due to the rust on the rear wheel, brought my Mercedes W204 to the coater on the left and right. It was so bad that a repair plate had to be installed. But that’s not the topic. When I picked up the car, I noticed next to the penetrating thinner stench in the interior and the paint with fingerprints that the windscreen wiper makes a strange scratching noise in the operation. As if the disc had been rough somehow. When I look closely, I notice that the whole front panel is fitted with tiny particles. These cannot be removed with glass cleaner and neatly scrubbing. It gets even better. Large parts of the vehicle paint also feel like sandpaper. Question: Can it be that the whole vehicle now has a paint mist layer due to insufficient gluing or incorrect handling when painting? I’m quite acidic, especially since the painting work is due to varnish noses noc would that now complain and demand that they polish the whole car. What do you say about it? Greetings Nubian