What metals for sure will the Glowforge be able to engrave?

[septimus39]

Glowforge Metalworking Capabilities

We’ve tested on anodized aluminum with great results. We’ve engraved a bunch of random metals (and ceramic, and a rock from the back of the building) successfully with Cermark, enough to believe Cermark’s own marketing materials about what it works with. I don’t have a list of which metals we’ve tested in-house. The physics here are pretty straightforward, though - if it works with Cermark and a typical 40w CO2 laser, it will work great on your Glowforge. I should note the rock from behind the …

Dan has answered this in another thread.