I was thinking that some mushrooms would look really good on a piece I've been working on, so I took some small river stones that I have been hoarding and tied them up in a chunk cut from the curtains. I also tied some up in the suspect scarf and boiled them up together.
And it worked! I only tied up a small corner of the scarf, thinking I might try some other shibori-style tying if it worked.
Here is a close up of the scarf and its lovely bubbles. It's still wet in the photo.
And here is the sheer curtain. The scarf seems to have bled and turned it a soft shade of blue. Not sure what is going on here -- I'll have to try it again without the scarf. But I love the shapes!