I see “rubber” as an engravable material, how about silicone bracelets? if a band can be held flat, any issue with engraving the material?
Is that “Yes - there is an issue with engraving silicone”? They seemed to work just fine in that video.
I think they meant yes you can, and no there is not a problem. Looking at some other places, I found a video on YouTube from a wristband “manufacturer” (I think they just order them in bulk from China and customize them, but that’s fine) and it showed them using lasers to engrave the materials.