Suzanne McNeill teaches this technique. You can find her blog at this address
http://blog.suzannemcneill.com/2012/...l-retreat.aspx When I asked her where I could learn the techniwue she said "go to the Design Originals channel on youtube for several videos on dyeing fabric. Our channel is Designoriginals123, the best video for this process is "How to dye fabric with permanent markers."
Hope you all go there and enjoy the great tutes!