I use the pool noodle-covered-with-muslin method, too, and just want to add that our state historical society stores all of its quilts on acid-free cardboard tubes. They cover all the quilts with acid free paper and use paper tags at the ends so they know what's inside. They have special hangers for the rolled tubes. I asked the registrar about using pool noodles, and she said they should be just fine for the average quilter. She didn't think the foam they're made of would be harmful to the quilts but did suggest covering with muslin just in case.