I agree with Cat - only no need to "press" the pleats, just steam them - the wrinkles fall out and if you hold the bottom of each pleat as you steam the knife pleats reset.

Go for it. Here are three of my PV USA Kilts rafting in Glen Canyon of the Colorado River...they get wet and dry quickly.







And just 'cause they ain't wet in these pics don't mean they weren't wet a few seconds later...they were.

Ron