Hot answers tagged paint
The problem would most likely be overspray and/or not finishing correctly. If there is a top clear coat and this wasn't cut/polished correctly, it could leave something like what you're talking about. This would be especially true if there was overspray somewhere which was not caught during the final finishing steps. You need to take this back to the place ...
Same as steel panels, only if you use wire disc on angle grinder, use a softer brush. Everything else the same.
Looking at your pictures, I don't think you need any filler. Just sand down and feather the areas, use a high build urethane primer to fill in any low spots, and paint. If you need a little filler (I highly doubt you will) icing works well for shallow scratches.
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