"It would seem to me fairly notable if Elves who remained young looking for thousands of years in Middle-earth also had a phase of looking aged. And here we have opportunities to describe, or even briefly mention (to make clear, if so), some phase before fading, or describe that fading includes the bodily ageing of Elves."
Then it would be interesting to know at whitch point (when) the faiding will start and if there a differents between Aman and ME.
Did I understand that right, the body ages, then the fea will overhelm and consume the body and the body is sort of invisible but can appear in the form of the former, young body, if the elf wants?
And so the body becomes untouchable? But what about the last battle (dagor dagorath) I think that at this point all the elves would be consumed by their fea, but how can they fight? And it is said that the elves would fight.
For me, the destiny of the elves sounds terrible

One can just hope that an elf has to be 50000 years old and older until that happens.
Thats an interesting quote:
"But in Aman, since its blessing descended upon the hroar of the Eldar, as upon all other bodies, the hroar aged only apce, and the Eldar that remained in the Blessed Realm endured in full maturity and in undimmed power and spirit conjoined for ages beyond our mortal comprehension" (Morgoth’s Ring "Myths Transformed").
This gives me the impression that this "fading" is more the problem of the ME elves. Of course the eldar in valinor are affected too, but not as radical as for the ME elves.