Got the same problem at home on 30x30 polished porcelain over the bath. 2 years on my wife has had enough of them looking streaky. Tried Wexa, QEP and HG with little visible improvement. Even tried the steam cleaner, this meant I could scratch it off easier with my nail and I lost about 3 pounds. Does the LTP Solvex actually do the job, bearing in mind this is a hard wax over the whole surface and not what I usually come across?
Meths?
Thats not an offer of a drink by the way.