How do I refinish a wood lateral file cabinet?

I got this lateral file for a really good deal. It doesn’t look terrible the way it is but I would like to refinish it. I have read so much conflicting information on the internet I have no idea what I should actually do. It has some minor scratche. There is a place where someone left a drink or something on it. Other than that the finish is just worn on the edges and I’m places on the top.
This is of a few of the scratches. These are the worst of them. they aren’t very deep
The ring where a drink was left.
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