I think fusible fleece will work ok for a wall hanging. I have used it for table runners that I like to be flat. I don't know what type of quilting you like to do, but quilting will show up. It just won't be puffy, of course. I don't think it will wash off or come lose and a wall hanging won't need frequent washing anyway. I would surely not try to remove it at this point. This may turn out to be a look you like for wall hangings!