Well, I managed to get myself into a tight spot against my fence so I couldn't go forward or reverse without scraping the side of the trailer. Ended up damaging both driver side front and back corners...
If you try to re-attach the damaged moulding, you will always see the dents and bends in it. The l-shaped piece is impossible to perfectly straighten out. As far as looks is concerned you would be better of to replace it with new. Also with regards to resale value.