i doubt i'll ever find an answer to this as its been so long but i figured why not.

I once recall years ago that there were some skin mods to the Commandoes that removed the custom markings and gave them the clean white look as seen in the games earlier screenshots.

anyone know if it was ever finished/released?
i can't find jack for the game any longer :/

I don't know if any mods like that have been released but I do know that what you're describing is certainly possible and probably quite easy to do.

i don't doubt it'd be easy, the skins are actually already in the game really (visible when you first gear up in the intro stuff and training)

but i've not a clue how i could bring them over to the main chars and whatnot.