Also interested in this, but haven't tried it myself. Apparently NSF (Nano Silver Fluoride) is more commonly in non-western countries.

They have a video with some more info here: https://pt.fourthievesvinegar.org/w/9aa66b49-2ec5-497f-9f49-...

And apparently the use of NSF does have a bunch of research papers written about it: https://www.researchgate.net/profile/Amol-Patil-43/publicati...