Annodized aluminum comes in many forms. Note that Al is oftened alloyed with other elements. Check with the manufacturer to determine the exact content of your Al. The density of pure aluminum is 2.71 g/cm3. Bare aluminum can be silvery-white to gray depending on surface roughness.

Val found that the default settings for his black 1.5mm annodized Al left a smoky or hazy sheen. To get a clear white finish he used speed 5% power 100%.