User blog comment:Matt Hadick/Ultimate Battle Final Round/@comment-6434623-20130709233837/@comment-4738647-20130709234516

Silver a precious metal or more commonly gold is indeed in modern electronics including mobile phones and platinum is used in catylic converters in cars but no precious metal would make up the bulk of the machine espically a large truck let alone an alien truck made out of some alien matieral, also in G1 coating a Transformer in Electrum (a naturally occuring alloy of silver and gold) raises their defensive capabilities exponentially so if Optimus were made of silver then he'd be even more powerful and he is given a unknown alloy coating resistant to radiation, heat such as that from a Supernova in the two part episode of his ressurection