Attempt #2

I selected one section of the heartbreaker quilt to treat with a bleach pen, and then I washed the quilt with a color grabber. I did this twice.

After both treatments and washes the grabber sheets came out the same color: yellowish green. Yep. The quilt is still shedding dye.

Here's how the treated section looked after the second wash.

Here's a side-by-side comparison of the treated section with an untreated section. The bleach pen worked better than I thought, and while it didn't do much for the yellow migration stains, it lightened the green splotches a lot. So I'll keep at it and see if I can clean it up a bit more.