This is the file folder card I used in my tutorial. I embossed it and used acrylic paint and Utee over it.
I used a smaller file folder and used distress inks on it and splattered it with water.
I just glued down one side of the little file folder, so I would still be able to write a note on the other side. For the lines I just dipped a metal ruler in ink and stamped it on there. On the edge I just used some washi tape.