Breps sub surface texture attachment under GH

Is there a way to get Rhino material of Breps sub surface textures under Grasshopper?

For example i’ve got this cube which white with a metal face, a redapint one a glass one. I would like to be able to extract thoses informations under GH.
I would first “Deconstruct Brep” and then would probably use on face “Get Rhino material” but doesn’t work. any suggestion?