Easy Diy Watercolor Cards . Align the two rounded rectangles at the top and slightly overlap them in the middle. Unfold the cardstock and you should. EASY DIY Watercolor Card Budget Friendly Paints! kwernerdesign blog from www.kwernerdesign.com I mentioned in my last project, the decoupage painted. Ungroup the rectangle from the text & image. Sweet watercolored wreaths are just the perfect thing to paint for holiday greeting cards.