Coloured from one of my previous sketches: https://www.weasyl.com/submission/143104/herbie-grimm-trade
Tried something new this time. Doubled the canvas' size, used N°4 lines, coloured, and shrank it down leaving N°2 lines. Kudos to Ragg_Topp for that.
Cel-shading should be my next priority. My problem isn't how to apply it, but positioning.