I rang Ronette, who is not only my drawing teacher, but an ex-weaver and ex-weaving teacher.
Her first suggestion was meth, second glycerin. The third suggestion was more acrylic. She initially meant for me to use a tiny brush to cover enough of the white spots. But then we started to talk about surface painting. And I wonder, has anyone used acrylic paint to embelish a cotton scarf? Do you think it will be very stiff?
The other option is beading and possibly embroidery, but I think this one is too netty to hold the weight of beads (unless I can find really tiny ones) or be the base for embroidery floss.
So now I'm looking for alternatives; instead of removing the boo boo, can I cover it in an attractive way?