[ATTACH=CONFIG]503815[/ATTACH]I don't think I would try to wash the top before quilting or you could have lots of fraying and distortion. I recently made a scrappy batik quilt and did not pre-wash. It also had white Kona cotton accents, and I worried about bleeding too. So after I finished the quilt (binding and all), I washed in warm water with about 6 Color Catcher sheets. There was very little bleeding, and the white stayed white! But I would use lots of color catchers in your first wash just to be safe.