I'll let you know in a few years! :) I just bought a can of some stuff called "Sureguard" at the local camera store, which is what they recommended. It's primarily a UV protectorant. I think it was Brent that gave the name of one he's used in the past, but DeRusto is the only thing I can think of. (I'm not sure that's right, but I associated it with spray paint.) There's also one manufactured under the name Marshall, which is supposed to be very good, too. The camera place I shop hasn't been able to get any of it lately. I've been told you can buy this at craft stores. We have one called Michaels in our town, and the people I talked to looked at me like I was crazy, but I think it may have been just the salespeople I was talking to that weren't familiar with it. If you go to a place like that, look over by the oil paints. The Marshall brand is popular with artists because it apparently lets a person paint on top of a photograph that's been sprayed.