Recently I was looking at Norman Rockwell charcoal comprehensive drawings and trying to understand how the rich textures were created. The surface was so beautiful, like fine bread crust. We decided it must be connected to the type of paper used, but couldn't imagine what it was or how to access something like that. Suggestion, a section or lesson or podcast devoted to the subject of what we draw and paint on. There's so much out there about what tools and media to draw with, but relatively little is said about what we're drawing on. The interaction of drawing tool with surface is so important. There's also the issue of longevity. It would be great to help demystify this topic. What are popular brands, what do they do. If they are colored how long will the color last? Are there inexpensive ways to create durable surfaces? Etc. What do you think?