Most old pictures have character due to age but some are beyond character like the one below.

Slide the handle in the middle of the image right or left to see before and after.

You can use a program like Photoshop or Lightroom but I run Linux operating systems so I use GIMP which is similar to Photoshop but GIMP(Graphic Image Manipulation Program) is open source aka free. These programs have painting tools and other tools useful for touch up. I mostly use the Clone tool which allows you to copy a tiny spot from one place on the image and use that sample as a brush for dabbing. I also use a smudge tool to blend those spots in better sometimes. The ear was tough.