Two weeks after the initial sketches, the purpose of the design was announced: create a piece to hang on the wall: Wall Art.
Since I already started to draw some of the sketches in Adobe Illustrator, I took the whale and started working on it. Adding styles to make it look like it had been drawn on a chalkboard.
That did not work out as well as I woul have wanted. So I brought the pieces into Photoshop and started to draw with chalk brushes to get the real hand drawn look.
And this is how it turned out:
Here is a close up from the chalk brushes that I used: