I have a few pieces of old wood that are scratched up but I want to keep original. I have heard walnuts work but I have never tried them. My Mom & Grandma always used Old English dark scratch remover for making an old piece look new and I have followed in their footsteps. I am NOT getting paid to recommend their product but if they want to send me supplies or pay me, that would be cool.
This is the stuff I use, they also make it for light woods.
Here it is after. It looks brand new for being an old piece. Here is the side by side.
I love the way it looks after. Here it is on another piece, my 100+ year old piano. This is the before:
The lighter part at the bottom is just reflection. Almost instantly the wood looks so much better and the results last about a month or more.
Here is the side by side. Looks pretty nice for wood from the 1800's!
I have found mine in some grocery stores or on Amazon, it's definitely a staple in my home.