I want to surprise my parents for their silver wedding anniversary with a pendant engraved with the audio waveform of their grandson’s first word. My brother in California told me that there’s currently a huge demand in the U.S. for this kind of touching custom jewelry, where sounds are visualized on metal. Has anyone ordered something like this remotely from the States? Is it easy to read the code later using a smartphone, and do these lines wear off over time when worn?