Step 1: Find yourself a laser cutter
For right now, there are a number of services that you can go to who have laser cutters. In the Bay Area we have Tap Plastic or East Bay Laser & Water Jet. Once you've tasted this tool you will never be happy without one.
In our case we have a 45W Epilog Mini 24. Shown here:
Step 2: Find Your Art Work
This image started as a GIF. I then imported the image into Corel Draw and sized it correctly.
Step 3: Choose Your Target
+ Anodized Aluminum
This corresponds to a huge variety of different items that you can personalize:
+ Picture Frames
+ Etc. Etc. Etc.
Step 4: Choose Your Laser Settings
Step 5: Do the Engraving
Then make sure you position your object correctly and HIT START.
It's not unusual for small sparks to pop off the surface, but in general this should be a reasonably safe thing to do. That being said, my recommendation is to never walk away from a running laser cutter and be prepared to stop it if things go wrong.
When it's done. Take it out, wipe off the surface, and enjoy.