Dina, for what it's worth, I use Ritz Dye Laundry Treatment. It is a dye fixative, and I use it in my very large stainless steel stew pot. I mix it according to the instructions on the bottle, and start, beginning with the lightest color fabric. In your case, you may have some serious problems with the colors mixing together. Question: Do the fabrics fade, i.e., on your white with the colored stars, does the color "run" or "bleed" onto the adjacent white? If so, that presents another set of problems. If not, then I would use the dye fixative -- let me grab my bottle, so I can be sure I've got the exact and correct name (I corrected it above). Since you already know the fabric "runs" or "bleeds", I think your choices are somewhat limited. As much fabric as you have, though, if it were me, I think I'd take a chance on using the dye fixative. I have no financial interest whatsoever in the product -- I just know that it works for me, and I've used it for several quilts, particularly the red and white log cabin shown in my avatar. I used the same mixture in all of the shades (except the white tone-on-tones-which I pre-washed). I started with the lightest shades first, bringing the water to a simmer on the stove top. I put in the dry fabric (and I have done 3-5 yards in my stew pot) and keep the water warm/hot on top of the stove for about 15 minutes; then, using large tongs, I put it in the sink, cooling it down with cold water, wring, and put in the washer and run a rinse cycle, dry and use. I know it's work, but I've never had a failure on a cotton fabric, and I test all my fabrics, before and after. If the fabrics don't bleed, I don't treat them, but most of your fabrics will bleed some, vibrant colors more than a lot of others. I ordered the product online -- just do a search online -- Dye Fixative or Ritz Laundry Treatment -- it only took a couple of days for the product to be shipped. It's definitely worth the effort -- I cannot afford to use fabric and have it bleed either in a quilt or in a garment. JMHO! Whatever you decide to do, good luck with your project!