I shaped a 9"2 polyester longboard from scratch 14 years ago. I was in a hurry and did not sand the bottom deck. I used it on small surf for many years with only minor problems that I repaired with ding.
Recently I decided to finish the job and gave it to a shaper to make it more hydrodynamic. The shaper said that he blew the air bubbles, sanded excess resin, and gave it a new "resin bath". I used it a few times and indeed it had better performance.
Last week, on small surf of 1m and normal waves in the Atlantic, I felt a protuberance in the board and came out of the water. I was surprised to see the bottom deck bent with a large part of the cover ripped and the stringer bent. The top deck is intact. The board stands in one piece and I was unable to easily bend the board.
Here is a view of bottom deck of surfboard:
Here is a view of ripped cover and bent stringer:
Here is a view of the right rail:
Here is a view of the left rail:
A few months earlier, another problem had appeared with a broken surface with no clear cause, which I covered with a sticker:
The shaper said that, because I had used too much resin, the fiber had surfaced and the sanding had removed part of the fiber, making the board weaker.
Since I had used the board for 13 years without a problem and now it has two problems, I suspect that the shaper made the board permanently weaker. Or it could be simply bad luck, or that a longboard this big has a pronounced lever effect.
Is the board worth repairing? If not, I now prefer availability to performance, so what type of board would avoid such problems in the future?