The usual wood trim finish was lacquer.
Three choices with restoring:
1) Leave alone
2) Sand down to bare wood and refinish (I use lacquer for a finish when doing this)
3) Do this:
<iframe width="560" height="315" src="https://www.youtube.com/embed/PBEa-DzQGA0" frameborder="0" allowfullscreen></iframe>
Alan