Loved jin's version, so I basically used the same recipe. This is mk1 of my war machine series, I'm working on mk2 right now using same recipe with some tweaks, but I'm not gonna spoil the surprise.
Base: inferno armor iron man
Forearms: hom iron man
Lower legs: war machine
Gat: heavy duty roc
Hip guns: mars playset with rare earth magnets
Arm guns: ult war machine, 2 inch diecast war machine (u know the really old ones that were metal)
Custom mixed paints all over (special chrome, gun metal, silver, black, steel, etc)
Resculpted the head, added the sight from a cast war machine head, sculpted the belt, and bullets from some gun pack at toys r us

I love it, hope you do too