Hello,
I'm new here and working with AutoCAD für my bachelor thesis. I need a little support from you to solve mine problem. I created an 3D object in AutoCAD quite simple shape and now I need to add to this object a second surface layer (surface coating) but I have no idea how to do that. I would be really happy if anyone could help me 
And please excuse my bad spelling, I'm not a native english speaker 
Best regards