I recently bought a 1985 O'Day 192. The boat appears to have gelcoat blisters on the hull below the water line. I'd say they are about 3/8" in diameter and maybe 1/16" high. Has anyone else had the same problem? Is this seriuos, or should I just forget about it and go sailing? I've tried to get info from the previous owner but he didn't have it long and wasn't aware of the blisters. Any opinions or suggestions would be appreciated.