Update: the fiberglass came off in about an hour and a half, thanks to the good work of some friends at Evergreen Outfitters in Mayville, NY. Now I'm removing the residual resin, using heat gun and sharpened pull scraper. (see photos below in chronological order.)
I'm wearing a 3M mask so awesome you could use it to cook meth.
Tedious, but it's moving ahead.
This repetitive task has given me plenty of time to think. And the question that popped up today was: WHY AM I DOING THIS?
That's not rhetorical. I'm wondering specifically what the purpose is of removing the resin. It gives you a smoother hull, for sure, but does that matter, if you're going to put glass right back on? Does it matter if you're going to canvas the boat instead? Are we talking cosmetics (that's actually what I'm going for), or structural benefits (always a concern)? Are there alternatives? There are some tough-to-remove areas around the stems that I'd love to leave intact if they won't cause problems.
And what about that gray stuff left behind, embedded in the grain after I've scraped off the resin ... Does it need to come off too? Will it make it harder for me to sand the hull?
Waxing philosophical. Some resin smoke might be penetrating the 3M. Plus my scraper is melting. Need to finesse that heat gun.