Over at shackspace I used the 50W CO2 Laser to personalize my latpop lid.
I think it turned out really well. The aluminium oxidizes and thus turns white.
Settings used: scanning with 500mm/s @100%.
As template I created a two color pixel image with 1200dpi resolution.
“Scratch the surface of most cynics and you find a frustrated idealist — someone who made the mistake of converting his ideals into expectations.” – Peter M. Senge