On NGS group we're starting a new book study using Darlene Olivia McElroy & Sandra Duran Wilson's book "Surface Treatment workshop". I highly recommend this book. I may look at each section, but couldn't begin to cover all the wonderful tips, troubleshooting and variations they pack into this book. Also their color photography and examples are fabulous!
The authors recommend using found objects to add visual interest to your projects because acrylic paint may clog up and damage the rubber in the rubber stamps (most are made to be used with inks). I think the found objects also add a lot of interest and make your projects unique.
In the book, Darlene and Sandra, discuss how techniques can be used as additive, subtractive, in combination and/or as resist techniques. For this project, I decided to play with both the additive and subtractive uses of stamping with objective. Started with white card stock. Painted a layer of terra cotta colored acrylic paint on the one on the left.