Re: A fiberglass hull problem...
I think you should get on the inside and see what you've got. I'm not much of an "imagination" guy, so looking at the pics it's hard to be conclusive, however, I have seen blisters and they can be very ugly. Usually, in a blister, it will look conical, very close to the "nail head popping through" thinking. If that's what they are, in order for the Marine Tex to fix them, I'd think you'd need to fare the spots out and fill an area twice as big as the blister itself, because you need to "open" it. Think of a pimple; if you just try and get the whitehead, it stays and gets bigger. If you get all the yucky cottage cheese out, however, it'll be gone. (wasn't that an awful analogy?). It the sailing world, blisters are always a consideration since the boats tend to live in the water for most part. I'm assuming she was in a fresh water lake, though? Otherwise, I'd think you'd be dealing with a huge barnacle problem too.
And I don't know which line of thinking is correct, but I'd heard that blisters came from water permeating the gelcoat too? Could be a wive's tale, I guess, but it is "one of those things":redface:
