I have observed a couple garage paint jobs that have been sanded and buffed out the next day and they look perfect, but a few weeks later they start showing cloudiness, sanding scratches, and minor orange peel in the clearcoat. What is weird is it's not consistant over the whole car, but just random patches of it here and there.

The production body shops I familiar with here wet sand one time and then use heavy compounds to get the shine out of it. The cars look nice out in the sunlight when the customer picks them up, but under garage lighting they are full of flaws.