Been years and years since I did any cross stitch on stamped linen, but the blue is suppose to wash out. I would not even try to quilt that top until I washed it - gently - and pressed it from the reverse side damp. I use to put a towel under it while I pressed so the stitches wouldn't flatten. I think it will look great as a one piece top. It is going to be quite a treasure when your done.