Back in the day------we used to iron everything.
My husband was in the Air Force so I had to iron his fatigues. What a job!
I would sprinkle them down, roll them up, and put them in a pillow case, then I put them in the frig over night. The cold and damp would take out all of the wrinkles.
The next day I would spray starch them, with my starch that I made from the dry box of starch and adding water. Faultless? Back then they also had a bottle of starch that they used just for collars and cuffs, very, very stiff that would last through 3 or 4 washings, I haven't seen any in a long time. Not much need for it now.
Syl