hmm i laughed at another one of ya crazy questions at first gareth
![LolLolLolLol :LolLolLolLol:](http://www.radbmx.co.uk/forum/Smileys/smilies/LolLolLolLol.gif)
but when i think about it you could try caustic soda..
i bought some for de-annodising and my lass read the bottle then used it to deep clean the grout in between the bathroom tiles... came up a treat
![daumenhoch :daumenhoch:](http://www.radbmx.co.uk/forum/Smileys/smilies/daumenhoch.gif)
so in theory i suppose you could try that for deep cleaning white tuffs
![daumenhoch :daumenhoch:](http://www.radbmx.co.uk/forum/Smileys/smilies/daumenhoch.gif)