How to starch the round skirts?

[hikouki]

Has anyone figured out a way to starch or crease this round skirt:

https://www.bricklink.com/v2/catalog/catalogitem.page?P=50689pb02&idColor=1#T=C&C=1

...so that it will actually look like the one on the minifig?

https://www.bricklink.com/v2/catalog/catalogitem.page?M=dis056&name=Minnie Mouse - Yellow Polka Dot Dress&category=[Disney][Mickey and Friends]#T=S&O={"iconly":0}

Thanks!