Dude, that's a sick model.
Here's a suggestion for the texture. On the torso, take a very small and scratchy brush with high opacity and draw some scars with an extremely light tint of aqua-green. Then, just apply a little bit of shading around the scar using yellow-green to make add altitude and texture. You may want to use scratchy brushes for the shading too, or just trace the outline with a dark forest green (near black) over the scar, then highlight the very center with white and a 1 px brush. It should also add variety to the skintone, which is always great if well blended.