Grout staining help!

[matthyde83]

Hi - I have had a porcelain terrace laid and yesterday my dad grouted some of it for me. It was a nightmare day with weather and in hindsight shouldn't have started but now I'm faced with this... please please help. How do I clean this up? I've tried elbow grease, floor cleaner and Lithofin KF Cement Residue Remover mopped on. This is the current state...

Grout is norcross flexible wide joint

 

[matthyde83]

Hi - I have had a porcelain terrace laid and yesterday my dad grouted some of it for me. It was a nightmare day with weather and in hindsight shouldn't have started but now I'm faced with this... please please help. How do I clean this up? I've tried elbow grease, floor cleaner and Lithofin KF Cement Residue Remover mopped on. This is the current state...

Grout is norcross flexible wide joint

 

[Dave]

Use the kf remover neat on a small area and see if that removes it.

 

[Kevbos]

Hi - I have had a porcelain terrace laid and yesterday my dad grouted some of it for me. It was a nightmare day with weather and in hindsight shouldn't have started but now I'm faced with this... please please help. How do I clean this up? I've tried elbow grease, floor cleaner and Lithofin KF Cement Residue Remover mopped on. This is the current state...

Grout is norcross flexible wide joint

Really you in a bit of trouble !! But I'd try using sand paper to remove the worst of grout to as close as you can , before you touch face of the tile ! Then use brick acid !leave it on 15 mins wash off and use again as required ! Be careful sanding and using acid !!!