I got my first scar on Monday on my Brand new 2015 Sierra select 32QBBS. 5th trip out this year and not a single scratch inside or out. Backing into my storage unit on Memorial Day in the rain, I got a little ahead of myself and got a little crooked and backed under the roof support beam. I got lucky I realized it when I did and just barely rubbed the roof but it did put a slight cut in the roof. I ordered a roll of eternabond roof repair tape and the color matches pretty good and from the ground, no one would ever know. Plus the roll came in 25' X 4" lengths so I have about 23' left for all the future oops. PS this repair tape seems pretty good and really easy to use. Only time will tell.