I tackle anodized aluminum, and I link a second video showing me making mistakes with aluminum. BOTH have useful information.
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Been my experience that just about any setting works well with Anodized Aluminum. I’ve done some tags like in the still for your video, that a friend anodized for me, as well as some anodized blank name plates I bought. Today, I engraved my niece’s brand new Macbook. I just did full speed and 100 power and it came out great. But on one of my first tests, I did full speed and lowest power and while it didn’t mark it very well, even that left a very visible engrave…
The laser doesn’t have the power to hurt the Aluminum, it can only attack the anodization. So I have to agree. I think it’s probably the least challenging material to laze. Provided you’re in focus, you can have too little power for a really good engrave, but you can’t have too much. 
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Can agree. Biggest issue with aluminum is focus. Well, that was one of 3 mistakes I made.