I was honored to be a small part of Miles' day by creating the Key to the City of San Francisco, and the City of Gotham, which the Mayor presented to Miles at the end of the day. This Instructable documents my process for making the key, but the techniques I used can be used to create an incredible range of projects. I had a little over 12 hours to complete the project (three of which were used for sleeping). I also wouldn't have finished without the help of my buddy Arthur.
Step 1: The Artwork
I used Inventor to make the outline that we would then use to cut out the key, by bringing in this reference image and tracing over it. This could have been done in something like Adobe Illustrator, but I'm used to using Inventor so that was just easier for me with my tight deadline.
After that was done, I moved into Adobe Illustrator for the remaining artwork. There were two sides to the key; the first was for San Francisco, and the second was for Gotham. I incorporated as much artwork from the reference as I could for the San Francisco side, and worked within the time I had to do the rest.
Step 2: Cutting the Key
Step 3: Laser Etching the Artwork
Once that was done, we used an Epilog 120W laser to cut a template out of wood so we knew where to place the key for engraving. Then we engraved both sides of the key.