Another question for possibly tweaking my old Model 19's...

Over the years, I have tried to use furniture grade "lemon oil" to keep the walnut cabinets looking new. It seems like an endless task. Also seems like the wood is not at all well protected from anything set on top. I try to keep people from setting drinks on them, but at times it just happens. So now I am thinking of a sealer... I don't particularly care for the plasticy look of polyurethane. So I was hoping someone else has already been down this path and found a decent product to make the cabinets look good without altering the original "oiled" look.

Has anyone found such a product?

Thanks for any suggestion.

Carl Bill