I have quilt blocks that are embroidered by my MIL with yellow roses and some blue flowers on them. I really would like to get this top pieced together and quilted. Here is my problem---they were a pre printed kit and the fabric that was used is so thin. Should I just go ahead and quilt them or should I place a piece of white cotton on the back of them then the batting and the backing before quilting? The background of the embroidered blocks are white. Would be interested in any help you can give me. Thanks