I decided to take Soul Balladeer’s hull down to the gelcoat in order to prep the lady for 4 coats of barrier epoxy and two coats of antifoul paint. The gelcoat was very smooth so it was difficult for any other coating to adhere to it .
The hull was sandblasted and the crew is now sanding with 40 grit before putting on the barrier coat.
Two years ago I had any visible blisters ground out and filled with epoxy so the only blisters on the hull now are tiny ones. Nevertheless, we are dealing with them once and for all so SB will be blister free for many, many years to come.