Up Birthday Card
I dropped the opacity of the sketch and worked above it on a separate layer with a more detailed outline. I exported the finished sketch to Adobe Photoshop as a PDF and created a new layer to colour each element in the painting. Once I was happy with my colour choices I created a final layer to add outlines / details and to write a birthday message.
To give the card the feeling of a traditional painting I placed a paper texture over the top and used a blend mode to subtly composite it.