When I air out my quilts,I put a flat sheet on the ground,then the quilt, and place another flat sheet on top. You can leave it all day and not worry about the sun fading it. On a porch rail,this will eventually break or fray old fabric. A friend of mine gave me 3 old quilts and wanted one of them to be cut up into pillows for some gifts to his family and I got the other 2 quilts. I cut out the 14 inch blocks then I faded a repro fabric, by washing in the dishwasher,I cut 21/2 strips and sewed them around the pillow and added cotton batting,then I tied the added strips to match the original work. It took a little time but they made perfect pillows for the old rockers and antique chairs. His family love them and I got 5 sets of pillows for my family.