Glue that doesn't wrinkle paper.

I'm currently working on a commission for three princess paintings/collages.  Here's The Princess in the Pea, and I am still working on Rapunzel and The Twelve Dancing Princesses.

In the past I have had friends ask me for some pointers on how to create their own collages.
Most of the time I just spread Modge Podge unto small pieces of scrap book paper onto my painting.  The trick is not dousing the paper with too much Modge Podge, and never watering it down with water or it will wrinkle the paper.
Recently I've discovered Neutral pH Adhesive by Lineco that doesn't wrinkle paper!
Perfect for that bed I made with all that paper in one area!!!
I hope that someone finds this info. helpful ;-)
Have a great week-end!