"water stains on Hard wood floors"

I have been asked to remove water stains from a HW floor without a Poly finish. This type floor only has a wax finish on.

I can get the stain out, it does take some effort but of course the wax is also removed.

My way of thinking is odd at times to say the least, my question was if you cannot poly this particular type floor, how can I prevent the stain from happening?

The customer gave me several pieces of the floor he had left over, after removing the water stain and rewaxing it I sprayed this piece with you guessed it Fabric protector. It has been two day’s so far and I have poured water on this piece several times, so far so good, no stains. Give me a few weeks and I will update the progress.
💡 maybe