Retha shared this one at the Inn for us to play. I liked the end result and wanted to share here too. Been experimenting with DCSpecial's Ice4 filter a lot. Adds a lot of artifact coloring when applied to various retouching techniques that I've been doing of late. Here, I used Impressionist with the default chalk setting set to darken. Obviously did other things too, but the majority of the effect was done using these two filters.

Just click and expand the link below to see the result.

Good color chalk effect.