I would like such a coating to be conductive. I have found that bead blasting the parts prior to anodizing works very well. But racking and handling instructions are very important, since most commercial anodizers are not very concerned with finish quality. Presently our shop as well as our suppliers provide black anodize but it always has a sheen to it. Roughing the surface doesn't provide consistant results and seems to degrade the anodize process.
Smooth surfaces are reflective.
To a lessor extend I would like such a coating for steel parts but the aluminum parts are more needed. Anodize coatings are also thermally and electrically insulative. I would like such a coating to be conductive. But racking and handling instructions are very important, since most commercial anodizers are not very concerned with finish quality.