Jetson TX2i TPP surface finishing black painting material

Hello, I would like to know the type of black painting material, I think it is anodized, used in the surface finishing of the TTP of Jetson TX2i. In case of anodized process, which type of anodizing is used?

Thank you very much.

Hi, we are checking this inside, will update once available.

It is black anodized, no further info by now.