Sen Kwid Renault art car

Quote from Patrick Lecharpy, Renault's Design Director in Paris:
“In the Kwid that Sen painted at our invitation, it’s the first time an artist has narrated a story through his painting style in an art car, in contrast to earlier art cars done by famous artists like Lichtenstein, Warhol, Koons and Calder that showcased just the artist’s style of art.
“I am fascinated by Sen’s bi-cultural aspect in his art. The Kwid art car vividly reflects his French inspiration, Indian colours through 'Ville Enigmatique' where he juxtaposed historical French Bengal and Victorian Bengal with traditional Bengali life that continues till today.”

[@sislertx]

What kind of paint did he use.