Take some pictures when you’re down there next.I used Dumonds Marine PeelAway as a test kit and applied with a putty knife to the starboard chine up to the waterline to remove antifouling paint from years of applications- 6 x 24 inches. After 6 hours I removed the paper/chem solvent and was amazed at its efficiency. However, after rinsing off the residue I started to notice some serious looking blisters(Osmosis)? Small and many! Now I believe I have confirmed my suspicion. I re-cleaned the area and doing so reduced the blisters. Being exposed to the sun and the chemical reaction from PeelAway just torched that area. I covered the area to shade it and the blisters were reduced to near nothing. Go figure?
A friend thought the blisters were so pronounced because it was the first time in years that the hull was able to breath without paint. Thank you Pointed Rose and Summertop!
My next step is to remove all bottom paint with PeelAway. With luck I might find it is not as bad as it appears!! if you have any other advice I'd appreciate it. I've had this boat and engine since '91 and I hate to give up on her.