Did this guy before the holidays. Posted him on procustomizers.com, and then promptly forgot all about him until now. Took probably 3~4 hours of work altogether.
Went for a dirty look on the robot parts, which I believe I acomplished. Also tried panel lining for the first time on his vehicle parts, which went alright.
I've also included a picture under natural light, since I weirded out some of BB's colours trying to fix the yellowing of the pictures I took.