This shirt really resembles chainmail and it's what some films like Monty Python and the Holy Grail and the Lord of the Rings did when the costumers didn't feel like making actual chainmail.
So without further a-do, I bring you: Lazy-Man's Chainmail.
Step 1: Materials List
A knitted sweater: I Got this at the thrift store for about 2 bucks. Not just any Wool Knit Sweater would work, though. Try to look for sweaters made with big yarn and knitted to look very "Chainmail-like"
Silver Metallic Spraypaint: By now I'm sure you know where I'm going with this.