I have had some luck ironing out creases. Also wrecked a couple so you decide. Not too hot dry iron. Print face down on smooth clean white cloth. Clean cloth over back of print. If using a steam iron be sure it is dry and is not going to spit.
Good luck Powell > > My cat decided to have a look at them the other day and in doing so, put a >small crease about 3/4 or so long right in the centre of two of them.

