At Studio L3 we are working on challenge # 15 on page 53 of Timmy's book. Now I have to admit, I wasn't sure what was meant by "Agate on Grunge" till I talked it over with my sister (she is so smart). This is a technique I do frequently and love it. Alcohol inks have got to be one of my favorite things to use, other than my DI's.
For my "Things That Go Bump In The Night" I used Grungepaper for my entire canvas, and coated it with Gesso means I don't have any Dabbers (shame, shame on me). I used Pitch Black, Pebble, & Gold alcohol inks for the sky, then Terracotta, Ginger, Butterscotch, Espresso & Copper for the earth, and lots and lots of Blending Solution. I used Black Archival Ink for the stamped images which are a combination of Oxford Impressions "Wicked" & Cherry Pie Stamps "Dark Boundaries"