Can I cut on this? If so, recommend settings?
Aluminum won’t cut, nor will it be marked with an 80 W laser. If you use anodized aluminum, it can be marked/engraved.
@fred_dot_u is correct. To cut aluminum sheet metal, you would want to be in at least a 200W machine, have a metal cutting head, and have an understanding of the material and how it affects lasers. Kern Laser Systems wrote a nice piece on the topic: