I'm impressed with the skills. One cool trick I thought he had I didn't understand at first. Once I did I think it's the balls now. He sketches in grey. Then draws the permanent lines in black. To get rid of all the sketch lines he fills with the same color grey, and then fills white. Then you're left with just the black lines you want.. Much faster/easier than going around with the eraser... Looks weird in the video, once I understood what he was doing I liked this technique a lot.
Also very impressed with the shading as well, especially making the chrome look like chrome. That one wheel takes him half the video. Definitely worth it at the end though..
Extremely talented though..
