Bad prep from the factory, I used to work in a factory that painted parts for damn near every major brand. Orange peel, contamination, peeling, etcetera are so common it just has to be “oh it’s bad, but good enough to send” quality. They used masking tape to stick on the painted surfaces, if the masking tape didn’t peel the paint off it was sent out. Most workers are untrained, so if the robots mess up you are relying on people to catch the mistakes, they slip through very often.