"You try? No way." Gladio held up a hand as if to stop Romeo before he went and just shoved his whole hand into the stuff. "Wouldn't forgive myself if it turned out to be some kind of acid." Though when he removed the stick he'd been poking the liquid with, the stick came away fine. Just covered with the goop.

"... Not sure the best way to actually test this stuff out. I don't have a jar with me." And he was definitely not science minded. He was kind of tempted to just stick his own hand in and see what happened.