Never tried, because fluorocarbon's index of refraction (1.42-ish) is further from epoxy resin (1.50-1.57) than nylon (1.53). It does make sense that fluorocarbon has replaced nylon because it's going to be less visible in water (1.33).

I guess the epoxy's index of refraction depends on all kinds of factors such as the mixing ratio and the conditions under which it cures.