Would this detective work be a fairly easy task for a PhotoShop adept?

Suppose we have a personal diary entry written on, let’s say, January 22, 1959. Written by hand, not mine, in fountain pen ink and in script that I know very well.

Suppose someone else had come along later, at least 25 years later, and scribbled out the entry in fountain pen ink of a slightly darker color, and with a different stroke and style. It’s just a long wavy scribble, and what’s underneath is almost but not quite completely obscured to ordinary view. I can make out one word: “disgust.”

How hard a job would it be for someone with good PhotoShop skills to filter out the scribbles and reveal the original sentence?