In my experience whatever glue protocol you follow as to how many coats and drying time, the key to not having a sloppy mess is to make sure the glue on the tire has cured for good while (think 30-60 mins) before you install on a rim with just applied fresh glue.
i generally use two coats of glue on the rim and one on the tire. When I used to use more, excess glue tended to squirm out and discolor the gum walls.