I had some collodion, (the stuff you use to make wet plate images), that I had mixed up over a year ago. Normally the life span is about six months. Rather than just toss it out I decided to give it a quick test to see how bad it was. To my surprise, not too bad. It's very slow, even for collodion but I got an image.

Collodion on aluminum, 5x7, one pop from two Speedotron v202 2400W.

Pardon the dusty scan.