Well, I think its scrap as well. For the mask, I think that the different masks are for diff. clans. Or that every pred is making or asking for the mask he want. But Im moer up with my mask=clan theory. As for the blades, its obvious that were made to prevent the aliens from getting too close. The acid wont corrupt the weapons armor. But it will injure the pred if it gets on him. They were speculation about the facts that a preds blood will neutrolize acid, its crap to me. The preds arw aware of the danger the acid is. So since they are young, they are giving a chance to avoid it.