Are the SS Space Black and Alu Space Grey solid metal, so that if I scratch the case I wouldn't see "white" metal? I believe the Alu Space Grey is anodized which I don't know it means . . . the color is "fused" is some way, but how deep is the grey color? Regarding the stainless steel Black, if it's not solid black in color how deep is the color? Probably better than just "painted" on?