First, Protoform Prime. Can you say 'eight different metallics'?

More pics here!------> Protoform Prime
Protoform Starscream. Only six different metallics, but still just as detailed.

More pics here!------> Protoform Starscream
I know these may not be cannon to however they're colored in the comics or the glimpse of proto-Prime you may of seen in the movie but sometimes I need to get creative with my colors and techniques. The blue-to-green chest on Prime has be grinning from ear to ear because it worked. As did the transition from one metal to the next shade.