I've started using PVA glue a lot to make new painting surfaces and perhaps to make some shadow images. When it's dried it has a very beautiful opalescent quality.I found that using different drying surfaces and adding objects into the glue generates some amazing and delicate patterns when it becomes solid.
This is a PVA surface that I made using a CD case. I painted on it with oil paint and scanned it to see what that would look like. Another thing that I find really beautiful about these surfaces is their listless movement when you hold them in your hand.