johans

I'm pressing the final row on a queen sized scrappy quilt. To get a good press before quilting, I'm spraying lightly with water and using a hot iron. This quilt has thousands of fabric pieces of all colors, shapes and sizes. As I'm pressing, I see where a red/black print has bled into a lighter color fabric. The same fabric has been used about a dozen times throughout the quilt, but so far only the one piece shows any bleeding. If it were just one piece, I'd take it out and replace it (a time intensive task, I'm sure) but there are many scattered pieces of the same.
I prewash all my fabrics, and this is a remnant of fabric used on previous quilts. I also wash my quilts before gifting and have never noticed this problem with this fabric.
My question is: Is there a product or procedure to keep this from happening? (I know - stop spraying it with water, right?) Should I just leave it alone for now and use Color Cathchers in the wash? Can I treat it with Retaine? I really don't want to get the whole quilt wet at this point. All the seams are pressed open, and there are MANY!
I'm sure this has been addressed before, but a search has not yielded an answer for my situation.
Please advise if you've got a solution - no pun intended.