I'm not saying "ya have ta do this man"...because I'm not sure if it's altogether possible or that it might bloat the size of the mods rar files if it is. Most likely if all that's true or not, it would be time consuming to do anyway I'm sure. What I envisioned was some sort of gore tastefully applied - to the soldiers in first person. Essentially the forearms, hands, sleeves, etc. The blood puddle effect third person applied to the first person arms, to be activated (pop up) after receiving a wound or trauma. And just guessing here, but I'm sure that would have to be applied to each 3d model set of arms (a lot of importing/exporting and rebuilding perhaps.)
Anyway, if a shortcut or work around to limit the hassle was possible, I'm not saying use the puddles from 3p literally, I was thinking new applied texture maps. One example for long sleeves, the texture could be applied to look as if it's leaking down the sleeve/arm, but only visible at the wrist/cuff extending to the rest of the hand (picture the green-coated US faction holding a 1911 with this effect) The weapon models of course would be another separate issue to involve, but realistically too involved altogether.