I have used a product called "Linen Wash". I use it to wash my antique dollies. I was amazed when one of my former clients (I don't machine quilt anymore due to my disability) ironed her quilt top without removing the blue be gone markings. I soaked her top overnight. I was amazed that the blue be gone was TOTALLY GONE! Since the linen store I bought it at closed 5 years ago, I am not sure where to find it or that it is till being made.
THANK YOU very much for your suggestion Ragamuffin. Sometimes the best cleaning hints are from our Grandmothers!