Interesting topics (each show lasts roughly an hour long) can be heard at your convenience on www.blogtalkradio.com/artistshelpingartists
(host Leslie Saeta). The interview with Richard Gamblin is informative. He talks about how he began making oil paint, its safety, colors. Listen to a show while you paint !! And if you really like a topic, your can listen to it again. And it is free !!