I used this on my bathroom titles and bath to get rid of bleach stains. Stains have almost disapeared, hubby cant see them I know they are still there. Another go I think they will disapear. Also toned down a dark scratch mark in bath where shower hose was. Used it on my ceramic tiled kitchen/dinning floor with bicarbonate of soda. Tiles and grout are like new with minimal amount of effort. It took along time to do. The worse bit was trying get the residue off the floor! Diffinately worth buying. Now going to to order some more.