Very nice results. Really like the subtle blend of foreground color with muted background colors...
If I understood your description the final layer stack looks something like...
1. Copy of BG layer; sketch effect applied, blend = hard light
2. Copy of BG layer; smudge stick filter applied, blend = hard light
3. Copy of BG layer; curves applied, blend=normal.
4. Background (turned off).
Questions
* For the benefit of others, is this the
sketch effect you're referring to?
If so, did you merge the two resulting layers?
Thanks for sharing your technique... Keep us posted as the $ starts rolling in!
~DannyR~