We had the same pocs below the w/l on 350. Only below the turn of the bilge. But there was a bunch. Decided they weren't blisters after reading all i could find. I decided to pressure wash, after ginding down all the paint/ gel coat, then let 'em dry good for a couple days. Painted areas with epoxy, then faired with epoxy and colloidal silica. Then we did a barrier coat and bottom paint. I think she's pretty well taken care of. Guess we'll find out in a few yrs.

I didn't find anything like what you have above w/l, and i took her down to the gel coat.

Hopefully they'll be in small patches and easy to take care of