Jon Favreau himself re-tweeted it because he was so impressed and i can see why.
Masterle247 (the username of the fan that made the suit) describes the process:
The reason why my armor looks the way it does. The reason being is that I used Phil Saunders War Machine concept and balanced some of the New "Iron Man 2" Armor design in to the concept, hence forth a hybrid War Machine Armor. I have seen the leaked Iron Man 2 from Comic-Con San Deigeo 2009 and most of the design I did fell REALLY close to the War Machine armor. so I'm really excited. Hope you enjoy my journey of creating the armor
Additional info:
-Built material High Impact urethane
-over 600+ rivets and rivet washer used so far
Spec's so far:
-Wrist rockets w/ laser v1.0completed
-Mini Gun simulated fire and drop lock system w/laser v1.0 completed
-Movie accurate Arch reactor v3.0
-Mid-section w/ movable plates v3.0
-"underwear armor" v2.0 Completed
-Leg's/Pants armor v3.0 Completed
-Armor shoes v1.0 Completed
-Neck cover piece armor v2.0
Things still need completed:
-Replusor gauntlets
-Upgraded helmet v7.0 w/ upgraded flip open/close hinge system
-lighted eyes "in progress"
-remote firing system "to shoot bottle rockets hehehe"
-replusor gauntlet top cover.
-Paint job with brush metal finish.
Many thanks to SCI-FI WIRE for the find.
LEEE777 - One word, amazing!