This last week I have been working on backgrounds that fit in pretty well with your challenge.
I had a bunch of white fabric that I had saved to use for foundation work. I was given a bunch of rusty horseshoes that was able to use to dye with.
Sample piece of silk stamped with Luminere paint using cardboard circles and hand made stamps from a cut up Styrofoam plate.
Rusted fabric printed on a ink jet printer with a music score.