How to Descale a Toilet - Fantastic Cleaners UK
Start with the medium sandpaper and gently rub the limescale build-up and stain. Rub until the majority has been removed, don't press too hard though or you may scratch the bowl. Next, use the fine grain sandpaper to gently buff the rest of the build-up and stain away. Flush the toilet to rinse away the residue.