Good job on the welds, it makes it more believable. The helmets need a rework though, they are looking like squares and dont look like an us ww2 helmet. Here is some ref on a us army helmet, just google us army ww2 helmet and there is like a million pictures like this one to use as reference
I would try something less invasive. Experiment with scratches in the gloss channel. I also agree with Mathis. The helmets look odd & not like U.S. helmets.
Looking good, though I think you are missing some details, especially welding lines (mainly on top of the tank where the hatch etc. is meeting the turret). Also are these objects on the left side of the turret supposed to be helmets? If so, they look way to cubic and not round enough.
Thanks for the advice Mathis. Yeah, it was definitely bugging me not seeing it welded too. I'm trying to see if I can do it Substance Painter with the welding brush, though when I resize the brush, it doesn't keep the pattern and just paints a straight height map. Might need to do it in ZBrush then rebake. I'll fix those…