I am still working with almost raw canvas [just a thin wash of gesso to prime] and using inks and fluid acrylics wet into wet. I have been playing with some of my drawing media to make marks. I am especially becoming a fan of the Derwent Inktense Pencils. If you use them while the canvas is still wet, they become insoluble when they dry. I also really like the Caran D'ache Neocolour I which are oil based wax crayons.