I mixed Lee alox with water in a spray bottle, probably 20water:1lube, and it was too little. Brought it down to about 15:1 and it's very smooth sizing. I drilled a board to hold 250 5.56 cartridges and just spray them with a dollar-store bottle, and it gets just enough inside the mouth too. It dries off in an hour, and I don't think you even need to wipe it off afterwards. But if you are very picky Lee is water soluble (obviously) so it's easy to wipe off.
Just be sure to microwave the bottle to warm the water up, and shake it well, because the stuff does seperate over time.