My iron has settings 1-9 which one would be the polyester setting?
I'd go low, 1 or 2. Either that or use a press cloth. That way the iron isn't in direct contact with the cloth. A thin piece of cotton is a good choice.
My iron has 6 settings and #3 is for rayon and polyester. You have to be careful that it isn't too hot because you can put a wrinkle in polyester or even melt it. You might try out the temp somewhere it won't show-a facing maybe.
