However, even if only one hour out of twenty was worked using the dusk mask, one glance at the thing after an hour or two of sanding would confirm its value.
I'm out of breath just typing this. And the sanding is done for now. Two hours out of more than I'm willing to admit. Only two hours of not breathing finely ground teak and who knows what mixed in. I will say the balance of unprotected sanding was less than 100 hours.
I'm an idiot.
--still pleased with the 1/4 sheet sander made by Ridgid