Help!

I wouldn't be too worried about aspen, but paper towels are best, just make sure that your temps/humidity are spot on. You don't need anything adding stress while he is healing.

I honestly don't know if epsom salt is safe or not. I doubt that this cut is serious enough to truly need anything applied... I wouldn't try the salt unless somebody else chimes in and says that it is safe.

(I'm going to see if I can find any info on if it is safe or not)

Alright, like I said, it's not very deep, but it's scary to look at.
I've been told that snakes have a hard time healing wounds, but I'm not sure considering the only time I've had to take one of my BPs to the vet was for an egg bound female about 2 seasons ago.

It's only deep enough to make him bleed.