Just had a quick search and it is not silver
"The car was analyzed and in many studies the enamel varnish of the aluminum car body was removed. Furthermore the car was cleaned. After that, the car body was polished with fine abrasive paper as well as special polishes to high gloss. The blank dress must not have any defects, because of the fact that retouching was not possible. Finally the car was protected with special clear varnish against environmental impacts"
Can you imagine if you got a stone chip and the varnish started to peel.