Hi Crys,
Yes, just add a few drops of water at a time to thin out the icing. For outlining to icing should be thick like toothpaste (maybe even a little thicker). For flooding it should be thin like Elmer’s glue or pancake syrup. Hope this helps!
Loren
Loren, http://www.thebakingsheet.blogspot.com, https://www.facebook.com/pages/The-Baking-Sheet/210664827961