I chose to work this drawing on rag illustration board; and I'm not sure what brand but it is taking the colored pencil layers terribly. If I apply too many layers, I'm getting a thick waxy build up with little pills of wax on the paper. I can actually scrape them off with an exacto knife. The small elements in the foreground are going on well, its the larger walls and sky in the background that I'm having trouble laying the color evenly. So I decided to apply solvent to dissolve the pencil and make it flow more easily. However, even the solvent is sitting on the surface and not still not smoothing out the pencil. Oh well, this piece has been a challenge and will continue to be ... I'll just keep experimenting with it.