see, this is more or less what i'm trying to hack out with the hydroxyapatite & high fluoride toothpaste. and, it's close to what my teeth actually look like, too.

he's using silicon dioxide + hydrofluoric acid. that is extremely dangerous, but i get the point - these ten percent fluoride toothpastes are probably not good enough. so, while the novamin + prevident is perhaps the right idea in principle, it's too weak to actually work.

can i buy crystallized fluorite somewhere and suck on it like a lozenge, with hydroxyapatite? 

https://www.mcfarlanedental.com/patient-education/remineralization-is-real-reversing-bracket-scars-and-discolored-roots/