Here are two Photoshop manips of Slit without the war paint to show each side of his lovely scarred face. They’re not perfect, but I should probably get to sleep soon if I’m gonna make CAH in 4 or 5 hours. I hope it works for you!
Also, working on this, I realized that Slit’s right eye is not nearly so fucked up in the first half of the movie, so Max probably did do most of the damage when kicking him in the head. His single-minded want of killing Max is a bit more understandable, now.