Recycling Old Uniform Shirts

I've decided to create another piece for the WAFTA Exhibition. Scream Savers changed their uniform ages ago so I have 10 old uniform shirts which I've been hoarding that I plan to chop up for the fabric. I figure with 10 shirts I should get close to 3.5m x 50cm of fabric just from the single later bits. I'm going to stitch or bind each piece to give a resist and then I'm going to have a go at the rust and tannic dye bath. One of my friends has invited me to play at her house in 12 days time so I've got quite a few evenings to do some interesting binding. Once they're dyed, washed, dried and ironed then I'll assemble the pieces into one large piece of fabric. I also have quite a large piece of muslin gauze which I might pop into the same baths so I can be sure I have enough pieces of fabric to produce the required 3.5m.