Sirius Glass
Subscriber
That procedure may well keep the Nikonos weather proof, but I wouldn't trust it to make the camera waterproof. Southern Nikonos at one time was the place to go, but they seem to be out of business. You might check this forum for other possibilities: https://scubaboard.com/community/threads/best-places-for-nikonos-v-service.363812/
Good luck, and please post your experience to PhotoTrio.
I no longer scub dive or even snorkle. I use the Nikonos V for rainy weather and that procedure is good enough for me, but as some time I will take it in for a CLA when warranted.