What to do with bad DVDs

I've been finally catching up on backing up my photos to DVD. My only problem was that the DVDs I was using were annoyingly faulty. About one in three came up with sector errors. I got some different ones from Arvin and they worked fine. So I know it's the DVDs and not my writer... thank goodness. So I had a stack of useless DVDs. I thought of using them as very thin frisbees but realized that could be dangerous. ;-) So I took one, put drops of water on it, and began taking photos. This is one of them. Check it out in large.