Hello there!! Thank you for visiting our website! Wanted to share that the process we use to customize the Apple Watch Ultra is by electro treating the watch to remove the blasted anodized finish and after this we carefully hand polish the watch to achieve a beautiful mirror finish. The polishing method we use is totally safe to the device and won’t alter any of its functions. Also, because we do not need to take the watch apart for polishing means that the 100 meter water resistance will still remain in place. Beware of other electropolishing the titanium watch which requires extremely acidic and harmful chemicals which basically eat the screws on the back of the watch and the speakers/mic inside the watch.
Please reach out if you have any questions!
De Billas Lux