We use double layers of vinyl gloves when working with epoxy. Makes it easy to change the gloves when they get sticky and your hands are sweaty. If you dont need that extra "surgeons touch", heavy dish washing gloves with a vinyl set over them is the best from both worlds.
Buy vinyl gloves in bulk (a thousand), and they are cheap.

I think epoxy can work its way through latex gloves?

I just came up from the workshop after glassing a hull panel http://woodastic.blogspot.com/