At some point, I do plan to sand down my hardwood floors and refinish them in my 100 year old home.
However, It's a 100 year old home. There is no subfloor, the hardwood is installed right on the floor joists. The finish has chipped off in places, has been gouged (not just a little bit) in other places, it's worn through the existing finish, and needs some repairs throughout the first floor. Additionally, there is a big sagging section where some floor joists have cracked (which I intend to repair before attempting to fully sand and refinish the floor).
Until I have time to fully address the repairs to floor joists to eliminate the worst sag in the floor and move all my furniture out, is there a temporary solution to covering up the damaged bits and protect the bare wood sections from water damage and high traffic?
Can I simply apply a topcoat of varnish that matches the color of the existing flooring or a shade darker?