I am appliqueing a king sized quilt with a mixture of regular cottons and wedding dress material (heavy taffeta most likely). I've already appliqued the train to the middle of the large background piece, but it was already ironed and had the crease.
To get the creases needed on the smaller pieces, I have to turn my iron too hot and it changes the shinyness and 'bubbles' the fabric in places. I usually use freezer paper, but I can't even get the iron hot enough to get that to stick to the back of the applique piece.
I can use pins... My other thought is to baste the pieces and then pull out the basting once the piece is sewn down.