So this custom was kind of born out of necessity... For a long time now I've had a toy shelf dedicated to the movie versions of various heroes produced in the 6" scale; aka the Marvel Legends and Movie Masters line. But between a desire to conserve shelf space and Hasbro's rather lackluster offering (no Mark VII Iron Man or Black Widow? Seriously?) I finally broke down and switched over to the Marvel Universe / 3.75" scale for my display.
Thing is though... the Mattel small movie lines kinda stink. I can ALMOST live with the articulation because I have most of them just standing there anyway, and the Batman figure at least looks decent (it's kinda hard to screw up all-black paint) but Green Lantern's paint job just looked cartoonish, especially next to the Movie Avengers figures.
So I spruced him up with a new paint job, using the metalic colors tutorial here on the site. I'd actually attempted something similar with a Movie Masters Sinestro before (wanted a yellow version) but it didn't look very good, and I still haven't finished it.