Man, the scarring/battle damage looks awesome. It works well with this piece, so it's nice that you didn't have to spend too much time sanding. Be prepared to do a lot more of it with halo armour. Unless you really want it to look that battle damaged.
The welding mask idea is cool, but you probably don't even need anything that heavy duty. I've seen plastic face shields that have the same kind of flip up headband mechanism.