Building is addictive. Some enjoy it as much or more than flying [8D]. As far as applying epoxy is concerned, a popsicle stick is as good a way as any. If you would like to smooth it out after dobbing it on, hit it with a heat gun and it will flow like water. If you don't have a heat gun, you will likely want to pick one up somewhere along the line if you are going to use any heat shrink covering at all.

Good looking plane, by the way. But then, they all look good to me.