Once a garment containing spandex has been overheated in the wash, is there any way to restore it?

A little accident with my washing machine means that trousers and jacket (of which I was particularly fond) got a dose of hotter water than intended. Now they're somewhat crinkled and ironing seems extremely difficult. Have I wrecked them forever, or is there a way to get them back to something resembling their former state? They are 63% nylon, 33% rayon and 4% spandex (but look like something much more 'natural'!!).