Mica is the main component used to give auto paints their metallic look. Mica is mined in sometimes terrible conditions in India and Madagascar. I wonder if Porsche joining the Responsible Mica Initiative has anything to do with the reduction in metallic finishes?
Weird, mica is extremely plentiful here - there's actually a scandal here where concrete blocks to build houses were made with too much mica, up to 14% in some cases. (It's not good for the structural strength of the concrete). It feels like you could walk into any field in some parts of Ireland and pick up enough mica to last the worldwide auto industry for years.