Updated Wednesday, July 21, 2010
This concept took an astoundingly long time to conceive, given my huge fondness for the episode that introduced the invulnerability-inducing compound. I initially began playing with "golden" icons in the autumn of 1997, essentially for fun -- then a long way away from having rendered every major Autobot or Decepticon character as icon images.
I elected to make a full collection of the 28 electrum-plated characters in June of 2002, albeit with a colour scheme that initially felt authentic but needed to be far warmer. In 2007, all 28 faces were redesigned, and the gold with them.
In 2009, another new round was initiated, with another new colour scheme. A few tweaks will also be made over the course of 2010.