Don't forget, there's a danger in what and how you use something for a case lube:
Any combustibles that get INSIDE the case will burn during powder burn, and will add, unexpectedly, to the pressure inside the case.
So, it's important, in my opinion, that anything that will get sprayed, and MIGHT get somewhat inside the case, should be somewhat inert. Inert doesn't make for good lube. Rolling cases on a pad with lube is the best way to avoid getting anything inside the case.
Having said that, when I do use a spray, I always spray with the open end of the case facing AWAY from the direction of the spray. Avoid getting any spray inside the case.