There's a very short list of who can play my guitars, not even some of my band mates would be on that list. My 12 string got pretty beat up once when I loaned it to a guy at a song circle that I attended. Luckily, most of the scratches buffed out. I thought it was safe given what I knew of the player, but I was wrong.
Next time rent a guitar...or buy a spare. I hate not having back-up axes.
I'm interested in how this story ends. Keep us in the loop, okay?