When I stamp on any material — even cardstock — I used the Perfect Crafting Pouch. The pouch gives a cleaner, crisper image on any material. There’s less chance of your ink smearing, even with these small polymer stamps.
For this layout I used half of a circle stamp to accent the top of my pattern paper block. After I decided where I wanted my stamp, I rubbed the cardstock with the Perfect Crafting Pouch. Since I didn’t want the entire stamp showing, I used a post-it note to cover up the part of the layout I didn’t want to be stamped.
You can see how the pouch helped give me a crisp image, even with a tiny word stamp on cardstock.
And, let me give a quick plug for the Best Glue Ever — the perfect adhesive for metal backed flair!