Back to the argument of prewashing.....it's old school....but I still do it. Fabrics are much better than they used to me but if you are making something you want used and washed and loved on, I would always prewash my fabrics. Some quilt shop owners will tell you you don't have to but I think a lot of the quilts they make are always hung in stores as models and not really used and washed and loved on like I want my quilts to be. Even if I do prewash, I still put color catchers with the quilt when I wash it! It only takes one fabric fading to ruin something especially with the modern movement of having lots of white and negative space!