One foam stamp, one pair of old blue jeans (almost on their way out), and some jet black acrylic paint were all it took to jazz up these favorites of mine. I was getting bored with them and felt like playing around. All I did was simply spread out some black paint onto a non-stick surface (I used Ranger's Craft Sheet here), and pat the foam stamp into the paint until it's completely covered. Then I stamped on the jeans, nice and firm... and that's it! Don't worry if the stamping doesn't come out perfectly, just dip a paintbrush into the paint and fix any parts you like. Ta-daa!
I had actually stamped on a pair of lighter jeans with white acrylic paint a few years ago and loved them... but alas, they don't fit any more. So I figured I'd try it again. I bet if I bought these at Anthropologie they'd be $249!! Cheap thrills work for me.