What a fun class! I enjoy a lot the step by step instructions.
I didn't have a white pen or masking fluid so when I need to leave white spaces, I painted the colored spaces with water and almost no color at all until I was satisfied, then i added color by dipping the tip of the brush over the wet areas. Result was that dry areas didn't get painted. From there i focused on the small details, blending, etc.
a) Scanned and edited on the computer.
b) Picture on the left was taken with phone and on the right is the same picture edited with phone. (resized to fit the screen)