Found a soft squishy spot abt the size of a 50cent piece on the side of my sail boat. Is that what a blister looks like?
Dave is correct re.: voids.Generally soft spots are on the outside of the fiberglass between the fiberglass and gel coat. You have to first identify what it is and then repair accordingly. Most of the time will be from the outside but again not much information was given to determine what is going on.
crazy dave condon