Hi all. I have recently tried for the first time Mapei's Ultracolour Plus Grout. I have to say first off that this has been done at home before using elsewhere, so i'm talking about my own bathroom. I have tiled using 200x300 ceramic tiles with Mapei Keraflex White. I then grouted using said grout but to my own detriment i left it too long before cleaning off. Most of the grout lines are fine but approx 1msq of tiles has overfilled grout lines. They are pretty flat but noticeable and not good to look at. The grout has been on since yesterday(Friday 2nd) lunch time.
I have noticed a thread that suggests lithofin cement remover for such things? Could anyone give advice if this is what i need or if there is another way to remove this to make nice grout lines.
I'd be very grateful.