I have set my fine shop-vac to “suck,”
But the dust flies around me, amok!
Now I’ve figured it out,
The solution, no doubt,
Is a “blow job” to get it unstuck.

I hate these steep learning curves! I cleaned the boat for four days, but the dust just reappeared. Finally, I attacked the crevices with the vacuum cleaner hose set to “blow” instead of “suck.” What a mess — this got the fiberglass dust out into the air (I was wearing a respirator), but after it settled, I vacuumed it up.