It's looking good, but a few things though.
The first thing I noticed was the star on the underside is on the wrong wing. Apart from some unique circumstances, on USAAF planes the underside star is on the right wing, and the topside star is on the left wing.
I think your Olive Drab paint is a bit dark. Here's a photo - this is a stateside trainer and has probably seen a lot of sun, so I'd say it's probably lighter than what you're skinning. Maybe some middle ground between this and yours would be best.
Also notice how the exhaust staining is a light color. Again this is probably an extreme example of exhaust staining, but it's a clear example of how the stain flows and how the color would look in time. Most people skin all exhaust staining black. Most planes will have it black but not all.
Here's some photos of this plane that you've probably seen already. I agree the sharksmouth looks black, but I think the spinner looks to be painted Olive Drab. All the profiles I have show it as OD too.
Also a small detail is you can get rid of the triangular recessed area behind the exhaust stacks. This particular plane is a P-40K, and very few Ks had that - this one's no exception.
The trick to skinning nice looking pure black and white paint is to not use pure black or white. Use a very dark grey for black, and a very light gray for white. In photos above you can see the shadow cast by the props is darker than the black on the sharksmouth. They may have used black paint in real life, but it doesn't look like a black hole and neither should yours.
Don't forget to skin a silk scarf on Scott.
