Is there any magical chemical out there ?
My problem is a toilet floor, grey non slip altro, we have very hard water in this area which doesn,t help. Under the urinals where all the drips and leaks sit have stained a dark brown colour "probably pee". I have tried a both phosphoric and hydrochloric based descalers with a machine and pad, this doesn't touch the discolouring however.
Any ideas people.
Kevin