I can laser etch just about anything on anodized aluminum, the etching is white regardless of anodize color, the intense heat from the co2 laser bleaches the color out of the dye. Can also etch onto stainless and other non-anodized metals, a ceramic compound is used for this which is bonded to the metal by the heat, the etching is black in this case. Just an FYI for anybody wanting to put a nice touch on a build. Thanks!