I picked one of these up a couple months ago off Etsy, and just finally got around to painting it to display in my living room. I highly recommend it, the seller was super helpful and shipped out quickly. I'll add some WIP pictures later.
Looks awesome man! Have always wanted to pick up a Monster bust, but never got around to it. Wish I had pulled the trigger on a Sideshow back in the day, but knowing me, I'd have flipped it for the huge profit the resellers make.
Honestly, a lot of what I did, was just the preshaded marble technique that a lot of people use on planes. I didn't really use any washes or complicated techniques. If it wasn't for Rafael Robledo Jr's videos on youtube, I don't think this would have turned out half as good.
A huge thank you to those of you who have commented, I really appreciate the words.