This 35 minute video by Michael Chelsey Johnson is like a Christmas present.
He presented "The Fine Art of Pastel" at 3 Masters Speak, in conjunction with the Sedona Area Guild of Artists (SAGA) Exhibition "SAGA: Visions of Fine Art", November 24, 2013. Click this link to go to Michael's website to view the video and a slideshow. And, especially for PSST plein air painters, take a look at his blog.
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