338 has similar pocks.
Where we removed the gelcoat the mat looks absolutely solid.
IMCO it was a manufacturing phenomenon.

BUT in talking with the yard guy here, who has a Triton and plenty of local knowledge about them, blisters are not uncommon in Triton hulls but never in any quantity. He pointed out that that uncoated bilge where there is constant water is the culprit. Can imagine that the polyester hull from the waterline on down has water in it. And the bilge constantly. 338 was diagnosed by the surveyor with a few blisters, but they disappeared by the time the bottom was stripped.

Can also imagine that spraying gelcoat into the onepiece mold and following with mat in the tight areas of the keel and bilge was problematic to say the least. Where the gelcoat and mat meet that is revealed in our grinding the surface is uneven and pobbled. I think it must have been a toxic nightmare getting these hulls laminated 40 years ago.

It looks like A/Cs are pretty lucky in the underwater gelcoat department.
Has anybody else had blisters?


I pryed a large abalone sized piece of primative bondo off the bottom of 338. It bared the mat and roving that had not been pressed down sufficiently into the nold. 338's rudder shoe when taken off revealed that it was held on by one pin, because the heel was mostly crystalized poly because the fabric had not been poked down in.