small blisters
JerryThree small blisters usually are not a prelude to bigger problems. Just open them up, grind down to good glass, let the areas thoroughly dry, fill, fair and seal them. If the problem recurs next season, you can barrier coat the entire hull which is good preventative maintenance.There is always the other viewpoint that says - why buy one with blisters when there are so many others for sale with no issues? Depends on the overall condition of the boat, the deal and how much you really like this particular boat.