This is the model on the new Mark 50 Iron Man helmet seen in Infinity war. It was made using Fusion 360 and an assortment of references from on set, the trailer and the leaked Disneyland France Ad. I have also made the faceplate non removable because if you look closely it appears that the faceplate has these sort of wings that come off them into the back of the helmet, making it impossible to remove the faceplate. Additionally this armour is speculated to be the MCU's version of the model 51 or Prime armour where the entire helmet just folds away and not the faceplate (this is also seen is Civil War. It is also called the Mark 50 because images with the title Mark 50 were leaked and it showed this armour. Im assuming the new Hulkbuster is either Mark 48, 49 or maybe Mark 51. Hope you enjoy the model! Also it is not scaled properly and will require manual scaling.
The blue parts in the 3rd photo show the new and improved pieces (you don't have to reprint the grey pieces just the blue) these pieces have improved the eyes and added the vents at the top of the mask. hopefully this helps you guys out.