Wash all my fabrics...I can't stand the pesticides/insecticides that are sprayed on them in the warehouses, so if I want to breathe, I wash. I don't iron them until I am going to use them, then I do starch them.
Had a friend make a lovely quilt, hand quilt it, then wash it (no color catchers) and her turquoise bled on the white fabric and ruined the quilt. Too many hours invested in a quilt to risk that, even with color catchers.