As far as the wasps, I got hit five times while trying to spray a ground nest, after dark. In the morning, I looked at it with binoculars. I did manage to take most of it out and felt vindicated. My son used to play competitive paintball. He came home and quite happily peppered the shit out of the rest of the nest with his paintball gun. It's how we roll here in Freeville. Hit them with the bee spray, then destroy what's left with a high test paintball gun.