I've decided to recolour Maxson's coat for use on my own character.

Darkened the leather a bit, de-rusted buckles and removed those ugly stiches. Honestly, does nobody in the Brotherhood know how to use an invisible stitch? I also removed the faction patch from right shoulder.

Textures, normal and specular map are pseudo 4K (enlarged and sharpened).

Works for males and females, and obviously affects the original coat Maxson is wearing. It also changes the black variant of BoS uniform into my red/grey version. If anyone wants I can upload a file without it.

UPDATE
Uploaded the version without uniform under optional files.

UPDATE 26.11.2015
New version with fixed normal and specular map. No more leftover dents.
                                                                                                                            

Mods used in screenshots:

Winter Wonderland by Stephanie Young

More Armor Slots by Abbalovesyou

Combat Armor No Star Decal by Milacetious

Combat Armor Recolors by Akalor

Black Pip Boy by Malcroix

Black Marksman Sniper Rifle Stock by Malcroix

                                                                                                                            

How to install:

Unpack the archive's content into Fallout 4/Data

How to uninstall:

Remove related files from your Data folder.

Or just use Vortex or MO2. Make your life easier.