I used taffeta for the big ole sun in a sea cliff applique. Did not stand up to use. Now there is a circle of exposed batting. It is just too loosely woven. I will never use taffeta again, no matter how pretty. I would like to see yours with interfacing. This was from my self taught beginnings. I also used bed sheets for background, which have deteriorated to the point that I just trimmed off the outer border!