They remind me of my first "quilt".
I was given my grandmothers butterflys that she had cut and started to stitch them to muslim. I follered her buttonhole stitch around each one and put on the antenna. Turned it into a quilt with sashing inbetween blocks. She loved it. And I was hooked~!
Oxy would be my thought and soak in bathtub, drying on white towels.