How long does it take for the spray to absorb into your skin? How long after application do you have to wait before swimming or showering? If someone wanted to use two different sprays as a stack could they apply one in the morning and on before bed?
It drys in seconds, and according to Patrick on a different forum:
absorption through the layers of the skin is a gradual process. it absorbs into the outer stratum corneum layer pretty fast though. the product will not easily rub off once it has dried
That said, I think it's probably best to try not to swim/shower (or sweat profusely) for 4 hours afterwards in general... although if you take it pre-workout, it may be unavoidable...
EDIT: On the 2 sprays thing, I tend to spray on one my front, and one on my back (I have my wife spray my back) 2x/day to keep steady levels.