I was recently commissioned to paint a logo, some lettering and the Wunderkid illustration, (all original designs by Lê Long, also based in Hanoi).
Stencils and Kolour spray paint on concrete.
If you are in Hanoi you can check Wunder Waffel out down at Zone 9.
1m diameter logo painted outside:
Mural and lettering inside:
Lettering and mixer close up:
Wunderkid: (2m X 1.5m)