feline fanatic

what a valuable resource that blog is! Thank you so much for posting it. I am hoping anyone who uses these pens read it to understand what Frixion pens are all about.
Jane, I am so sorry this happened to you but I don't think your quilt is ruined. I bet one of the products in this article will help to remove the stains. You may also wish to consider soaking the quilt in the bathtub overnight with some dawn dish detergent in the water. Weigh the quilt down so it stays submerged. I know this is a technique used to remove bleeds. Here is a great blog on it:
http://quiltsoflove.blogspot.com/201...hed-quilt.html
While these instructions are for a bleed, they may just work for the dried ink on your quilt.

I also hope that your posting, heartbreaking as it is, may keep another quilter from using these "wicked little pens" (and that is not wicked in the good sense) to mark a quilt for quilting. I think they are ok to mark a seam line like for HST units but not to mark anywhere on the face of the quilt.

Additionally I would avoid using peroxide at all costs. Leah Day posted how she ruined one of her show quilts trying to clean with peroxide. It basically destroyed the cotton fibers in the fabric. Now she may very well have used a solution that was too strong but why risk it. Plus this was an all white/cream colored quilt. Who knows what it would do to all the colors in yours.