I'm doing a remodel for my sister who lives in a fancy updated 1980's 3/2 modular and taking out the old kitchen cabinets a crew put the drywall right OVER the existing old original thin wood plastic walls that go in those things.

Kitchen is dark finish, solid wood paneling.

I keep any existing blinds, as they’re damaged beyond repair, I remove them and install 84” tall spiral end solid 1” thick curtain rods from homegoods ($16 each), on all windows (screwed into a wood stud), especially in bedrooms.

My second plan would be to fill the damaged area with some Bondo (body filler), smooth it out and color it a bit with colored markers to make it look like a flaw in the wood.

If I was still living in CLE I would try that route, but best for me to replace as I am fortunate that this will be my only expense this year on this property (knocking on wood!)

Tenants had built a path of wood so their children could get to their bedrooms without walking in the sewage.

@Mike Wood Thank you for your insight that was very helpful. 

They both look like normal wood.

Why would you want a tenant to caulk and if they do a crappy job, which is the most likely outcome, you will have wood rot to deal with?

Numerous debris left underneath home, including wood waste (termites), and loose insulation that was not installed properly.