Simply makes the vault suit, synth armor, polished metal helmet, and surgical mask chrome-like.The helmet has to be the polished version, standard version will be a bit more shiny, but not nearly as much.
Because, as everyone knows, in the future everything is chrome.
Edit your Fallout4.ini (ex: Documents/My Games/Fallout4):
sResourceDataDirsFinal=STRINGS\ to sResourceDataDirsFinal=STRINGS\, TEXTURES\
Extract the folder into your Fallout 4 Data folder
Click “Download with NMM” and activate in the list.