I've used scrappy binding on a couple of quilts. Definately make your strips longer than 6". Make them various lengths and sew them on the diagonal b/c when you join the final strips when you're sewing the binding on-it's joined diagonally. some gets cut off. If the strips start out the same length and then there is a short one, it will be very noticeable. But if they were all different to start with, no one will know where they were joined. Clear as Mud?