I just noticed this “damage” on our dining table, apparently caused by a damp towel left on the table.
Its a mass-produced, store bought table so I don’t know what it’s finished with but I would guess lacquer.
I think initially I will try some paste wax to see what happens. If that doesn’t work, maybe fine polishing compound to “rub it out”.
I don’t have any experience repairing finishes so any ideas are greatly appreciated.