I put a piece of bleached muslin in a garbage bag, with a hunk of old chain and some vinegar. It's been about a week now and it's time to take it out, (mostly because I'm tired of waiting).
I washed, dried and pressed the muslin and now it looks like this.
This is the only section that turned out to my liking. I think I'm going to take the piece, put in in a bucket with the chain and some more vinegar and let it sit some more.