1/25? Nice.
Okay, I'm going to be honest, but I promise I mean no harm here. He needs the shadows, especially on his forehead, reduced a bit. And you should take a stab at painting in his eyes at this scale.
At this large a scale the eyes shouldn't be too hard. Very carefully paint in the whites, but don't use pure white. it will look unnatural. Instead use a very light grey or pink.
Once yo have the whites painted in use a fine tip artist's pen to "dot" the eyes. Then run a medium reddish-brown or dark-ish skin tone to define them. Turn the model upside-down and then paint in the lower eye lids.
Take your time and keep your paints THIN. If you goof up you can repaint without having to clean any old paint from the mess-up. Just go over it again until you're happy with it. Also, one last tip, draw in the eyes very slightly inward. If he ends up wall eyed he'll look really goofy lol. But if he's cross eyed it will look just as ridiculous lol. So aim for the center, but very carefully aim one slightly inward.
I will sometimes paint the eyes over 7 times until I'm happy with it. (All 1/35 so far)
If you can practice on another model first that will help. Don't start with your best figure or you will quickly be dismayed and likely give up.
The uniform looks very good and I can not see anything else worth mentioning. You've done really well on this figure. I'd be happy with all but the face myself. :)
I hope my advice helps. If you have any questions or advice just ask. It's kinda my thing lol.
Edit;
Oh, the eyebrows! Slightly darker than the hair color should work. You could draw them on with a pen, but not everybody has black eyebrows lol. If you need a reference look in the mirror. That's what I do lol.