This photo of a wiggly little sister and ever-so-patient big brother is a good representation of a mid-level restoration photo. The tear and creases run through the middle of the photo, across the children's faces. The tear is significant in length and width, and there are many small wrinkles that spread out around the tear. There are also several other areas of branching wrinkles, dents, and blemishes that are more difficult to see on the photo at this size. There is also some yellowing from tape in the lower corner and some minor discoloration.
Since the primary tear runs through important detail areas for the image, it takes attention to detail to remove the deficiency without what looks like a digital scar. This "scarring" is when the repair work leaves behind an unblended or blurry, undefined area. This scarring, depending on the extent of it, can either be very distracting or subtle but obvious enough to look wrong. This is when running a self-healing or cloning tool over the image and letting the program do the dirty work just isn't enough. For this, you need to zoom in and work in small, overlapping areas while maintaining a mental position and vision of the overall photo. It's easy enough to lose track of what exactly your fixing and end up making the problem worse instead of better, so every now and then you need to "step back" by zooming out and get a feel for how the entire photo and correction are coming together. This keeps one from having to correct the corrections, saving a great deal of time and frustration.
Adjusting the color tone and removing the small area of yellow tape discoloration in this case is quick and easy. Adding some highlights and shadows helps add depth to the details and define areas a bit more. Overall, the image is repaired, corrected, and refined back to its original character.