How do you remove a water mark on a timber floor?

[#1]

If the floor is finished with a wax or stain, very gently rub the water stain on the wood with Rocket 100g Grade 00 Very Fine Steel Wool. If this removes the watermark, then stain, wax, and buff by hand.

For floors with a hard surface finish, you might like to start with a mild cleaner like Mop and Glo and a soft scrubbing brush. You can also try using the steel wool, and you'll likely need to re-coat the area with the same sealer when finished. - MitchellMc