If its the centre fin (on a multi fin setup) id just play on, see what happens. If its a single fin setup, probably not.

If RTM's break anywhere its right there so I think its going to fail. Agree with Elmo to sand it back and see if its just a big flex caused paint cracking or if the laminate is cracked. But Given others I've seen I suspect its the latter.

If you do, may as well fill it with lots of glass after and hope its repaired

RTM is weaker
G10 all the way for me, without question.

The ones I've seen fail are either due to the moulded on base (the fin is not all not one piece) and at least with G10 you can see it is
Or, if failed like the above pic it is in the same spot near enough, and from what I've seen - dry glass in the middle. Resin is not making it there in the infusion step perhaps.

As an aside, they also fare a lot worse in reef hits, tip splits badly

Mark _australia said..
RTM is weaker
G10 all the way for me, without question.

The ones I've seen fail are either due to the moulded on base (the fin is not all not one piece) and at least with G10 you can see it is
Or, if failed like the above pic it is in the same spot near enough, and from what I've seen - dry glass in the middle. Resin is not making it there in the infusion step perhaps.

As an aside, they also fare a lot worse in reef hits, tip splits badly

Thanks for the explanation.