Awesome armor!!
but I also think that you´d be allowed to use blood if there´s ever a CRL, a zombie is a zombie and as they behave in the book from which they originate blood is pretty much crucial for the desired effect. We troop for the fun of it and I think it´s pretty obvious that you don´t wear an armor with blood on it at a hospital, but at cons and the like, that would be really awesome.