I have a ceramic Pure in the gas grill ... when the fat burned in the grill for a short time unobserved, the white pure was completely black. Despite scrubbing in hot water with Spüli nada ... :-( I...
Window sills or other made of slate loses its black shine over time. This can be restored with conventional baby oil. brush up Clean slate Apply baby oil thinly with a clean cloth let dry Wipe off...