first I would recommend cleaning all of it using something like Restoration which is developed specifically for vintage fabrics--will surprise you how clean and crisp it will all look. then check out Kelly Cline and Cindy Needham's work--lots of ideas. Most projects will fuse the linens onto a backing fabric at least partially. Be sure that the fusible matches the linen used--i.e. the openness of crochet may mean using Misty Fuse to hold it place while you carefully stitch to backing fabric, while you may want to use a more permanent fusible to hold down embroidery work or cut-work.