My wife has a 20 yo Kawai upright panel, in a french polished mahogany.
The front panel below the keyboard has a milky haze all over it while all other panels are in perfect order. She thinks she may have used "Mr Sheen" on it once.
Does anyone know a way to restore the shine to the panel without stripping and re-polishing?

PS: On advice from the supplier, I cleaned with a 1:10 cloudy amonia and water solution. Worked a treat!!