Some quick and fun stuff.

ref is some random photo I took:
http://bv-design.com/stuff/van_ref.jpg

Colors look completely different because I tried to go for his palette.
Bright spots are mostly yellow, and darker mostly blue(somewhat green, somewhat red). Now that I look at it, it's way too saturated and to start with orange wasn't the best decision.
One key point are the short strokes which flow(don't cross!). Also the strokes are done with a high opacity(and blending activated) to give them the impact they need.