The experiment of rust dye-ing fabric!
This is still rusting, and colouring, as I write. I expect it will take a long time to complete.
It's in the conservatory, and as we've had a lot of got sunny days recently, the fabric has often dried out by the time I've got home. I'm keeping it wet though; and I look forward to seeing the results.
I'm going to use this idea as a session in one of the groups I work with, and see how they work with it. It's a long-term dye-ing process, and not one of instant results, like with the procion dyes on my course.