This is one of the few customs that is no longer in my possession.  I made this custom for a friend of mine, in exchange for a Marvel Legends Dark Phoenix.  Not too shabby of a trade in my book.  Thanos is made from a TB Smart Hulk figure.  He took a fair amount of sanding to get his in this shape.  His head came from a Marvel Legends Thing figure.  I used some vinyl from a Cool-Whip container and some Milliput to made his shoulder pads.  His gauntlets, belt, and boots were all sculpted from Aves Apoxie-Sculpt.  Thanks to Jin Satome for the Apoxie-Sculpt recommendation.    Some detailing tape was used on Thanos' helmet, chest, skirt, and nether-regions.  If you are Infinity Gauntlet expert, you might notice a problem with my pictures.  His gauntlet is missing a jewel.  That was later corrected.