If by "eternity" you mean "until some Twilight gets off his butt and fixes him", then yes. The damage the great Desus did is fixable by a decent Solar craftsman as an expression of his great mercy. And while Desus is many things; skilled fighter, expert negotiator, passionate lover, all around great guy, he has unfortunately never had the time to learn crafting skills. One can hardly blame him for the laziness of his Twilight comrades. Of course, compared to Desus' constant amazing heroism, I suppose anyone would look lazy.
Hey, ask anyone who's met Desus; they'll say he's a great guy!