Justin:
They seem really secure in those GoLite shoes. And I'm not sure how the epoxy would be applied – I didn't find any need to drill pilot holes. If I put a dab of epoxy on the sole and then drilled through that dab, I think the rubber would wipe the epoxy off the screw as it penetrated the sole. Maybe it would help secure the head of the screw to the sole. My son is wearing them right now on a steep, 2300-foot-vertical trail with his Nordic ski team as they cross train due to our lack of snow.
If I was to use epoxy, it would be to paint the high points of the soles (low points in use – the places that touch the ground) and then sprinkle fine sand onto the epoxy-wetted areas. Basically create sandpaper on the bottom surface of the sole. I have no idea how long it would last – 1 mile, 10 miles, 50 miles? – but a visual inspection could easily confirm the continued presence of sand.
Time to look around for another beater set of shoes. . . .