Since hauling Windsong out of the water I have been focusing most of my energy on her hull below the waterline. My goal was to get the hull to the point where it could dry out for the rest of the time on land. This would mean removing paint and the gel coat (if necessary) and then leave the hull alone while I worked on the rest of the boat. Fiberglass boats do in fact absorb water through osmosis (what creates blisters). The hull needs to be completely dry before I apply the planned epoxy barrier coat (protects against water absorption) and then paint.
I had researched many different ways to remove paint from the bottom. The most common choices are to sandblast, grind, use a chemical peeler, or just old fashioned muscle and scraper. I opted for the simple method of scraping with a cheap paint scraper from Home Depot. The bottom paint was loose enough where the majority of it came off with the scraper. I would scrape a section of hull then go back and sand away the remaining paint down to the gel coat. I started at the bow on the starboard side and worked my way back. Here is the hull after the first weeks work: Removing the old paint to the gel coat revealed quite a few small spots where fairing compound was used in some sort of repair. It also revealed the blisters I feared would be present. The worst case scenario in my mind were thousands of small blisters all over the hull. But what I discovered were isolated, larger blisters averaging about 3-4″ in diameter (some larger some smaller). When I found a big blister I would drill into it with a countersink bit to release the fluid inside. The fluid […]
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