My first attempt at this has been so much fun! I like the surprise of not knowing how something will turn out until it's done. I soaked cotton fabric in vinegar, then wrapped it around rusty bottle caps, rusty nails, and some steel wool. After 24 hours in a warm place, I unwrapped it and had neat rust-colored patterns on the cotton.The first photo is my favorite larger section of the finished piece. The second is a close-up of a smaller area that reminds me of a space-creaturish face, and I love it!