This is a fun and easy technique which gives fabulous results. I've used it on quite a few of my layouts and I thought I'd share it with you.
You'll need enough Gladwrap/clingwrap to cover your paper when its wrinkled up (approx one and a half times the width), a water spritzer, and a selection of Twinkling H2O's in a variety of colours. Please note, you can substitute the Twinkling h2o's with Radiant Rain daubers, or any type of water-based paint with a shimmer in it. The H2o's/paint should be a a runny consistancy. Splatter a few large drops of each colour onto your paper. Spritz with some water to increase spreadability. Lay the Gladwrap over your paper, and squish it so you create wrinkles in the Gladwrap. Make sure you do have lots of wrinlkes as this creates the cool concentrations of glimmer when its dry. At this point you can add more paint if necessary to cover the paper, or leave 'white' space if you like. Set aside to dry for a few hours. Press flat under something heavy if necessary.
Have fun and experiment using different coloured/textured cardstock to get different effects. I've also used this technique on my "Slip & Slide" layout posted on the 3rd of March,2010.
Let me know if you found this helpful.