Originally Posted by chris s
This is EXACTLY what this is... it happened to me on a previous car many years ago. I came back to my car to find a large plastic garbage bag stuck to my hood. It had rained, then the sun came out. Mine covered a quarter of my hood. I couldn't get it out with a polish my hand. It had to be removed with an orbital... Should be pretty quick and easy with a porter cable and a light cutting pad.
Like martin said, start low and move up in aggressiveness of the polish.
Thank you, now you know why I kept saying it was bag with water