After not finding anyone who has posted about engraving anodized aluminum, I figured I would figure it out myself. The SM isn’t a very strong laser, but it can do it. The trick is slow and steady. My settings are below, and I’m not sure if I could have gone faster. I did it at a work speed of 100, but wasn’t satisfied. I dropped it down, and it worked, so I didn’t mess with it after.
*Note: Jig holding the plate was also printed on the SM.