I would not use the starch basting on polyester, since it does require using the iron. I did use it on Hobbs 80/20 blend with no issue.
If you go to the post here on the board under Tutorials, I also gave a written breakdown of the method for those who could not view the video. The video is also available on a certain popular video sharing site that I shall not name since that is not allowed, But I have no doubt you could figure it out
