The information below is not accurate in the case of Etex.
Bubbles are pretty normal and there are ways to get less bubbles, but they go away simply by gently exhaling or blow gently through a straw (manufacturer says you can torch as well, but immediately, not in four hours). You should not be brushing and brushing and brushing and brushing. It does self level and brushed on in even coats, its fine.
Your advice is probably accurate with the other epoxies you have dealt with.
I have topcoated baits with etex more times than I care to admit; several hundred 2-3 ounce baits.