I found out about the Sofft knife last year when I was watching a David Jon Kassan video. It's a plastic palette knife with a small triangular blade, over which you slip a foam covering. You swipe it across a Pan Pastel and draw with it. I've fallen in love with it- the color is rich, the marks are soft and wide if you use the flat part of the blade, but then you can draw with the edge of the blade. You can also use black charcoal and white pencil to accent/highlight. They don't seem to be sold in any of the local art stores; I ordered mine from Amazon.