The description on their site states FRP and also available in gloss/matte carbon fiber.
http://1m-raze.revozport.com/1mgt.html#prettyPhoto
FRP parts are almost never painted. It is fairly common knowledge that FRP parts have a raw finish as its likely to be painted the body color of the car or any color.
However, I do agree that communication should be more on point. But it’s also the responsibility on the buyers end to ask questions and not make assumptions.