That's interesting. I'm sorta look'in at a navy personnel boat conversion. I used to work at
Uniflite and I can't remember the details but I do remember about the fire retardant resin but I don't know if they (Uniflite) even had hull blisters. I have seen numerous Uniflites with lots of blisters on the gunnel's but don't recall seeing them on the hulls. The only boat that I'm very familiar with that has no blisters is the swedish built Albin. I've never heard of a Nordic Tug w blisters but I'll bet they have the plague too.
Eric, Uniflites definitely had a problem with hull blisters below the waterline as did many other makes.* NT and others may have gotten on to using vinyl ester resins in the first 1 or 2 coats in the mold.* Vinyl ester is much more resistant to water intrusion and blistering.
I don't know what year John's Pilot is.* If it is a 2003 or 04 there is a good chance that the whole boat was layed up with Vinyl estor resins.* All Pilots then were built at the Midway GA plant.* The GA EPA was on them about emissions, so they discintinued using polyester resins until they could meet emissions requirements.* Anyone with one of those boats got a real deal.
In Uniflites defense, their hulls were virtually bullet proof.* They used no wood in the stringers.* They were built to last.* I would not be afraid of a Uniflite hull today.* You could fix the blisters and apply a couple of layers of vinyl estor or epoxy and have a great boat.