How does she normally clean the table top?

With damp cloth...it is definitely a green color...so strange...l have never seen anything like it...

I would call both the stain and sealer companies and see if they can be of assistance. If the sealer is yellowing that might cause a greenish hue on the grey especially if the grey is blue based. Yellow and blue make green. I have heard of water based products still yellowing.

Thank you and that is a good point.. I used minwax classic grey as one of the stains but not much of it because it did cast blue.....it does have a blue base... Thank you for response..

I have contacted sales rep for both products with not a good answer...so strange as l have used this same technique before...it is also on my table and no green...

Maybe they have more exposure than others to sunlight on the table or a chemical in their water that's reacting with the finish and it's causing the sealer to yellow. Check the reviews for the sealer on Amazon and the net and see if others had it yellow too.

Great idea...thank you again...