Here is the whole progress of painting the T-45d helmet. First I sealed the helmet with 3 layers of plastidip, then primer , then silver paint and as last I handbrushed on dark grey paint to give it a rusty and weathered look.
Spraypainted the armor silver and got the lenses installed for which I used a pair of dark tinted ski goggles and added a sheet of self adhesive headlight fly eye mesh to make them look cooler. And yes I can still see clearly through it.