Steve Specht here...
I thought that some people might be interested in a brief "lesson" in collage technique (although I'm probably preaching to the choir). I took photos while I was creating "Delicate Rana" (i.e., the blue frog piece) to illustrate the importance of covering edges in collage. Here you see the white edge of mat board on which the collage was created. Simply by using matching paints to cover these white edges, you get a much "cleaner" look which results in more powerful impact (imho). I use a ripped off piece of a foam "brush" for best results (if you use a standard paint brush, it's more difficult to keep paint from "straying" onto the surface of the collage). Enjoy!