How to remove stains from wood

[El Presidente]

I came across the below and was intrigued. I mean the two things members would have readily available is petroleum jelly and cigar ash 

Tell me that this wasn't discovered by a bloke who panicked after a big night and noticing red wine glass rings on the new $ 2000 dining table. 

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https://www.popsugar.com/home/How-Remove-Stains-From-Wood-45934570

 While some of the ingredients in this magic potion are a little weird, don't let that persuade you against trying it — it works every time!

 

1. Grab about one tablespoon of an oil-based product, like butter, petroleum jelly, or my preferred choice, mayonnaise. The oils help break up the moisture within the wood.
2. Gently rub the oil-based product into the wood.
3. Leave it on the wood for a while — the longer, the better. I typically apply it in the evening and let it soak overnight.
4. Next, find some cigarette or cigar ashes (about one teaspoon will do).
5. Apply the ashes over the oil-based product and scrub the stain lightly.
6. If the stain does not come out on the first shot, repeat the process a few more times. I promise it will eventually come out!

[Drguano]

Interesting. Of course my first thoughts about stains on wood were ‘lipstick’…

[BTWheezy]

As a guy who has worked with a lot of wood over the years, I find this really hard to believe.  Adding an oil-based substance to wood is usually a one-way street. And rubbing in ashes on top of that??  Might have to try this in a controlled setting in the wood shop, but definitely not on the furniture for the first time.  Any other woodworkers have an opinion?

[Rhinoww]

I’m with @BTWheezy. Using oil is a one way street for finishes and can leave the wood darker. Now the ash is a super fine abrasive. … not so sure you will get fast results but there you have it. 
I might have to tell my wife that I’m smoking cigars for the ashes though. We will see how that goes. 

[KCCubano]

Perfect! I knocked over a glass of whisky on coffee table. Went under a magazine and left white mark. Will give it a shot tonight.