I had all four doors wrapped with 3M PPF and installed the side moldings on top over a year ago. I used rubbing alcohol to clean the area before applying the moldings. Hasn't fallen off yet.Ditto.
The "paint protection" is just a clear plastic sheet applied to certain areas of the car. Most basic is to the door edges, door handle cups (fingernail scratches), and sometimes to the leading edge of the rear.
More complete packages include the front 8-12" of the hood and front fenders.