Put a kitchen towel onto your paper and iron it on hot. The crinkles won´t disappear because when the fiber of the paper is broken, you can´t fix it anymore, but it looks a bit better when you...
Braid them into 4 to 8 large braids, tie the ends w/ rubber bands, then dip them in warm water. Let them dry, the longer left braided the tighter the crinkle, the longer they last