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.
Sorry, it was a yes you can. Laserbits.com also sells a silicone bracelet that you can engrave and/or add a stainless plate that can also be lasered using Cermark.