I have used many different types of epoxies throughout my fly fishing and fly tying careers. And I agree that at the end of the day, they all do pretty much the same thing. However, after coming to Fishwest, I was introduced to Clear Cure Goo epoxies. They are relatively new in the world of fly tying epoxies, but have quickly gained popularity amongst tiers in both freshwater and saltwater realms. Their product line offers tiers a wide variety of epoxies, covering all tying situations from small nymphs for trout, to large saltwater baitfish patterns.
For the Mountain West, I have found that the Clear Cure Goo Hydro and Thin epoxies cover most of my trout fly tying needs. The Hydro is perfect for putting a hard translucent layer on chironomids bodies, and topcoats for shells on nymphs. The Thin epoxy has just enough viscosity for situations that require larger amounts such as when building heads for streamers and baitfish patterns. The Thin epoxy does cure with a slight tacky feel, so a final thin coat of Hydro is necessary for a tack-free finish. I would also recommend that if you consider yourself a slower tier, or really want to build larger heads, to purchase their Thick epoxy
No matter which Clear Cure Goo products you use, the final results are a finish as hard, clear, and smooth as glass that I have yet to find crack, chip, or yellow.