Once the watercolour is dry I begin to layer the charcoal, creating light and and dark at which point I can make any corrections that I am able to see. Then, I like to take a nice break and then come back to it, I ALWAYS see something glaring I did not notice, that is in dire need of repair...like this elbow...yikes
Ahhhh... that's better..! I also like to try to look at overall shading values to give it a realistic light dark balance. All done, what do you think?