Well, in the interest of science, I am going to report on what I did and how well it worked-
The base was duct tape covered, and I cut my fiberglass cloth (the woven kind) into strips about 2"x5". I applied spray adhesive to the mask form and placed the fiberglass strips. Once it was covered, I gave the spray adhesive a few hours to dry and then mixed my resin. I brushed the resin on, smoothing it as I went (outdoors of course, thanks for reminding me Robert) and set it aside to cure in the shade.
A few hours later, I was able to easily peel the duct tape away from the cured fiberglass and resin. It worked very well, and I am very pleased with the result.
Trimming it proved to be troublesome, though, so next time I will be less haphazard when I am laying the cloth strips.