But they DO degrade, or else they wouldn't need to be repaired. How can modern craftsman replicate the dwemer smithing techniques to repair them anyway?
The material doesn't corrode or degrade due to time. It is unreplicatable but not unworkable, so if you have suit of dwemer armor it could be repaired, provided you had the pieces.
Well was it 100% confirmed they were all dead? I never read much of any of the books, but this is what i took out of Morrowind:
*Spoiler alert
- The Dwemer pissed off a god for creating an abomonation that gave mortals the power of gods, so the god made all the dwarves in Tamriel disappear
- Yagrum was on another continent, so he didn't disappear, and he spent his whole life in vain looking for another dwarf.
- They mentioned a possibility that the dwemer have been "misplaced" somewhere else by the gods (but in tribunal it looks like they got turned to ash/exterminated)
So, I'm obviously not a lore-master, but it seems that some dwarves might still be alive on another continent, or perhaps they were swept away to another plain of existence.
i forget if the spirit of Radac Stungnthumz cleared up any of this info.
It is believed that the dwemer were transformed into the body of the Nuimidium by Kagenrac using the heart of Lorkhan. Yagrum Baram survived because he was in a plane of Oblivion at the time, once he returned he couldn't find any dwemer through the telepathic link all of them shared. The fact that the Dwemer in Hammerfell disappeared as well is strong evidence that no dwemer remain on Nirn. And yes Nirn is a spherical planet.
Also some of the writers have said that they would like to keep the true fate of the dwemer ambiguous.