This is the heart I created on one of the pieces of fabric with rusting powder and some lace at the edges:
Here is a piece which I decorated with hand embroidery, ribbon, machine embroidery, stamped hearts and wire spirals:
This is the key image which I printed onto fabric then sewed on:
And here is the whole thing:
This is just a starting point. I'm hoping to do more experiments with rusting fabric and to develop them even further to create pieces that are more beautiful. As always, when they come into being, you'll see them here.