Just received a mass e-mail from a supplier encouraging mirror framing. Something to remember when displaying mirrors is to avoid hanging them where sunlight can reflect and burn other objects. A local docent at a local library turned art gallery was once surprised to smell smoke and followed her nose. In a small room, a mirror had been reflecting for who knows how long onto a wooden room panel. The spot where it had been hitting was charred black and smoking. They were surprised and thankful to have found it before a fire. Another time, my previous employer sat several art glass paperweights on fine synthetic netting on our windowsill. After a few days, I thought to check for damage, and reflected sunlight through one globe had melted a hole in the mesh. The one other funky time we had with mirrors was when a customer asked the shop to hang her newly framed mirrors across from one another in the bathroom. My employer did as she asked, and later got a call complaining about their infinity effect. She had known it would happen, but thought the customer wanted that effect. Turned out, not so much. Feel free to add any other mirror/glass thoughts.