The "sky" on my card is some painted chipboard that I did earlier this week. I made a few different pieces in a few different colors. The chipboard is just a 12x12 piece from the back of a paper pack that I cut into random rectangles.
I took a photo midway thru to step it out if anyone wants to try this. First I painted the pieces with gesso. I just use a makeup sponge as my "paintbrush" and throw it out when I'm done. When the gesso has dried I paint on the acrylic paint and do a somewhat thin coat b/c I like for areas of the white gesso to show through a little bit. I have an assortment of chipboard shapes (don't we all!) that I think I'm going to paint up next.
Supplies: Odd Bird Planet stamps, chipboard, gesso, Making Memories acrylic paint, American Crafts textured white cardstock