-anyone ever seen a boat sink due to blisters? I don't think blisters should create so much panic.
I live in the worst place for blisters we have warm brakish water and the boats stay in it all year long. Lots of boats end up with blisters, even those high end companies that have said they don't blister.
I think the blisters I have seen are for the most part cosmetic only. ...except for the effects on speed performance, a lumpy bottom can't be fast. I had a few on my previous boat and I had them fixed -one by one.