The mystery mark wouldn't come out with anything. Not Frend. Not Nappysan. Not Kiss-Off. The fabric was starting to wear thin with scrubbing, so I decided to patch it. I appliqued a new piece of grey over the top and re-quilted through the top layers. No one will ever know!
It's probably a good lesson in not leaving quilts a year before finishing them. Taking that on board, I have basted the hexies. Not sure how I will quilt this one - probably, boringly, just out of the ditch and then something more detailed in the spotty border. (These fabrics never photograph well.)
I am not starting anything new until this one is quilted and bound.