rust for bronze?

I'm slowly working on the moth quilt, and I'm not really happy with the thick bronze/orange fabric, it's just too clunky. The other fabrics are robust but still elegant and refined, while the thick orange wool is just chunky. So I'm going to use the other two finer bronze fabrics, a lot of orange thread, and I'm thinking about trying out some rusting on the white wool. I stuck a heap of nails and screws in salt (don't tell James) and it took me back to high school sticking nails in salt water to see which one rusts quicker for science.