Gel coat crack

May 17, 2004
6,245
Beneteau Oceanis 37 Havre de Grace
That looks deeper than most gelcoat crazing. I’d grind down to solid, undamaged surface. If that’s just through the gelcoat than no big deal - you could just fair and gelcoat it back over, maybe with a layer of of glass beneath the fairing to add some stability. If the crack goes into the fiberglass laminate than you’ll need to rebuild with glass to replace whatever is ground out with good solid laminate.
 
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Likes: rgranger
Jan 11, 2014
14,230
Sabre 362 113 Fair Haven, NY
Those look like more than the usual gelcoat cracks. Follow @Davidasailor26's advice and investigate further.

It doesn't look like the boat is sitting on the trailer properly which could cause the cracks and potentially damage the hull structure. Do you have more photos showing how the boat sits on its bunks and the trailer?