Another challenge on Next Generations was to use acrylic paints and credit cards to scrape paint onto cardstock and create a background. I used metallic acrylics and made a line of blobs of paint on my non stick craft sheet. I picked this up with the edge of the cc and scraped it onto the card. I kept picking up more paint and scraping till the card was covered and I was happy with it.
Same technique but I still had paint on my craft sheet so I picked it up with the shorter edge of the credit card and created lines. It gives the piece some depth.