No, he won't need to do anything nearly so arduous. The armor and weapons that Hephaestus makes for his family require little except an occasional fitting. Zeus especially is never one to suffer if he can help it.

Thor's reply makes him smile -- small, but pleased. "Then I shall make it happen. Hephaestus has fashioned all sorts of things for Zeus. He knows how to properly outfit a god of storms." It may not be the same as what Thor is used to, but it's probably the closest he'll get to what he needs.

"If I am to convince him, I should leave now..." And yet Prometheus is reluctant to go. He does not want to leave his friend in this state. But what choice does he have? Thor will be like this for some time, and even when his fire and spirit have returned, he won't be free of the grief. "I will contact you soon."