Looks very good. Uniform colour is pretty well right . Small critique (certainly not of the painting) - the sculptor has depicted the neck opening as if it is a Denison Smock (short zip). M41 Jump suit had full length zip and the short bit to the left of it was a switchblade knife pocket, accessible from inside or out via a zip - to cut rigging lines.
I wouldn't mind having a go at this one myself!
Good work!
Airkid