I've tried scrubbing with Vim and steel wool, using a flat patra type thing to scrape, but nothing seems to work. Any suggestions?
How to Remove Cement Stains From Tiles
I took these suggestions off the net by the way. I've never tried it myself! All the best. Acid is corrosive so unless you have an expert who can determine how much to dilute the solution, it can be a bit tricky
Do I need light fixture over the bathroom mirror
Is it a good (or bad) idea to have a common bathroom of 2 bedrooms?
Renovating a tiny( 4'2"x7'8") outdated bathroom.