repainted Mk.lll helmet?

I just had a BMB 1943 mk3 helmet come in today. Its been repainted to the textured dark brown of the later models and underneath where it was scratched away to show the makers marks and near the rim where it has chipped away I can see what I believe is the original khaki green of the early models. I've been looking into it slightly and found someone saying that in they had some journals or some such notes saying some helmets were sent back for repainting. Has anyone heard of this happening, could this be a postwar modification or is this another case of someone repainting a helmet?

I think post-war refurbished and stored away , the brown factory paint is darker. The paint looks to be sprayed on.

Do you think this is an official repainting or done by someone who has had it along the way?

I think it looks fine.