Correct method for oak veneer speaker cabinets

[Dart77]

Hello, I have some vintage Infinity speakers as shown. They have oak veener cabinets. Parts of the wood are a little faded and stained (eg beverage cup ring stain) and I'm wondering the best course of action to bring it back again. I was thinking of lightly sanding and then using something on the wood. But not sure what? Maybe some sort of rubbing wood oil. I don't have any experience in wood so if you have any helpful advice it would be appreciated .

Thanks