This is freight / storage damage and will pop back out. Polyethylene has molded memory and typically can be returned to the original shape.
Here is an example:
mmiller wrote:
Easy Dent Removal
Kayaks can be dented by various means, no need to worry, they are simple to remove. Improper storage, cart use, freight/transport, too much pressure on tie-down straps all can cause a dent in a kayak. We have the solution. Watch Jacques Bernier in the video linked below. Jacques explains the simple procedure that, as you will see, can remove even a nasty dent in the side rail of a kayak.
Dent Removal Video: http://www.youtube.com/watch?v=OpuIJzMotDg
Success Story:
Kayaks can be dented by various means, no need to worry, they are simple to remove. Improper storage, cart use, freight/transport, too much pressure on tie-down straps all can cause a dent in a kayak. We have the solution. Watch Jacques Bernier in the video linked below. Jacques explains the simple procedure that, as you will see, can remove even a nasty dent in the side rail of a kayak.
Dent Removal Video: http://www.youtube.com/watch?v=OpuIJzMotDg
Success Story: