It doesn't always work, sometimes there is not enough color differentiation in an under exposed image to pull out the necessary detail for the restoration. Amazingly, more often than not, we can create a usable restoration copy from which we can restore the image. That's why we ask you to send us your image, so we can work our magic. 

No matter how big the project is, we can probably handle it.  Well, there are limits to everything, but we've tackled some pretty big projects.  It's a lot more work and expense, but in the end the final product is breathtaking.