Repurposed playing cards

Is there anything more useless than an incomplete set of playing cards? We have several. When primed with white paint however, they give a decent tiny canvas (I also tried using a cheap gold paint that needed to be appplied VERY generously to be opaque); the drawings are done in ink pens, pencil, gold pen, and acrylic paint. They are also nice to colour with printer inks that make wonderfully surprising patterns