There is an article in the recent issue of Rodmaker on this subject. Based on the collective advice given here, this could be the article. In summary it says wavy and uneven finish is the result of applying excess epoxy. Thinner coats are the key to an even finish. The waviness is due to epoxy sagging downward as it sets, even with rotation. They suggest you apply your epoxy, let it sit a few minutes and then brush off excess. That is assuming you are applyong excess. They also say the once the epoxy thickens, mix a new batch. Finally temperature is important. Higher temperatures thin the epoxy at first, but also accelerate the setting. The optimum temperature for applying and setting epoxy is 68 - 75 F.
If you are interested, the article is in Volume 9, Issue 1 of Rodmaker.
My biggest fear when I die is that my wife will sell my fly fishing gear for what I told her I paid for it!