The gold plastic they use is similar to the one Bandai uses on SD Gundam,
>>10225922is the closest from what i've seen online.
You may want to have some kind of glue on hand because some parts don't seem to fit snugly together, particularly the gold strips on the Sphinx's "mane" and the teal chin piece. You'd want to glue the chin piece especially since it's used to open the mouth.