I personally like the sound of holding the alcohol near its nose vs direct contact of any kind. Saves the whole safety vs harm vs swallowing vs inhalation vs biological harm arguments; I would imagine the abrasive smell would be more than enough to make the snake want to move away.

But as the others have said, with a breed like a BP, the bite is pretty much harmless (just wash it after) so there's no need to worry. Just give your little guy or gal a stern glare until they inevitably realize you are gigantic and it's a futile endeavor to try and eat you, no matter how tasty you might be or how determined they are.

I've had a few nips myself and honestly the cat hurts much much worse and usually puts up a much longer fight than any of my snakes ever have.