Little background on this one, my oldest son gets his licences next week and that is him in the side mirror. Teen drivers are the worst LOL.
Continue of step 5 of the local color and tweaked suggestion from @Jason-Bowen:
Step 6 - color the ink darker then the rest of the local color:
Step 7 - add texture paper on top and set it to multiple.
Onto the shadows and highlights, one of my favorite steps.