At first the model was painstakingly disassembled to separate the metal chassis from the plastic base, transparent windows and plastic interior. The stock gold paint was stripped off:
The dull finish was buffed to a chrome like finish:
Then the model was electroplated with copper as basis for the gold plating process:
The copper layer was polished to a mirror like finish:
Then the chassis was plated with 24 k gold and the model was reassembled:
So this is a kind of "Gold DeLorean" beside its famous 24k gold plated counterparts build by the Delorean Motor Company in the early 1980s (see here for more details).
Top image © 2011, P. Kirchgessner. Other images © 2011, Edward Hillery.