I primarily make Japanese styled fixed blades with stingray and tsukamaki wrap.
The other makers who do this style of knife have pointed me to West Systems epoxy. (Thanks Pohan and Sam!) They tell me that the stuff dries clear, and has a "dry" look when the handle is cured. Like Mr. Mitchell said, you cant tell any epoxy is on the knife.
The stuff is expensive, about $80 for the resin and the hardener. They come in pretty large cans, and I don't think they offer any smaller amount. They also offer a plastic pump for easy measuring, (like on a lotion bottle or somethin, but bigger).
I imagine the west systems stuff can do thousands of handles. The price is worth it.
A bit of advice, If you ever get the Kirby Lambert cord wrapping DVD, stay away from his advice on using "Titebond" polyurethane glue. That stuff is nothing but a foamy nightmare migraine. I never got it to work like he did on the video, and it's just awful.