My parent's home has a wall that apparently used to contain lots of pen and pencil marks indicating the height progression of my father when he was growing up. The house itself was built in the 1950s and the first time the wall was painted over was in the early 2000s (by accident). Afterwards, they thought it was not recoverable so they had it painted over once or twice more when renting the house out. Over the years they've always wanted to see if there was a way to get it back.
I am not sure if this is the right place to ask this, but is there a chance the pen and pencil marks could be recovered? I am assuming that if I were to remove the paint, the pencil marks might be destroyed. I do remember that when the pencil marks were made, the wall at the time may have been some sort of unpainted drywall. Would there be any options here anyone might know of? Thanks in advance.