Our group had this challenge of the Acrylic Block Stamping. Luv it ~ gives some great texture.
Using Tim Holtz Spiced Marmalade distress ink - rubbed it all over the block. Then spritzed with water. I wiped a little from the middle area to give the 'white' in the center. Then placed the block onto my paper.
Stamped the image with Staz on Black, then the swirls with stazon black and some of the spiced marmalade.