holy freaking crap i thought mine was the only one that did this
here's what mine looked like
took it back to my dealer 2 days after i noticed it, within a week i was taking it back to get the work done. they repainted the entire trunk and spoiler and paid for my rental for 4 days. competition chevrolet in stony plain alberta is my dealer and they did a great job fixing it. and because they did the work i now have a life time warranty on the paint on the spoiler and the trunk so if it ever happens again they repaint and pay for a rental again
if you need/want more info send me a message