Are you talking about in a quilt? You could probably use a double thickness of whatever white fabric you are using while piecing, but I'm not sure how easy that would be to do. If you are talking about lining a whole quilt top with white fabric, I agree with Bear that it would just be something else to have to keep flat. I guess you could spray baste it to the top. I have no idea how that would work or how difficult it would be to do.