Requires a enchantment scroll.
Buy a regular chainmail from any merchant (WH, SS).
Go see Lance Silversmith, located in the house in the mountains to the Southeast of the Two Bridges Island, before the druids of Arakas, with an enchantment scroll (obtained during the enchantment scroll quest) and 5,500 gold, and say blessed chainmail.
You can complete this quest at any time.
Reward: