Problems with porcelain

[Wheely]

Am having problems removing grout from 'pitted' imitation stone effect have started to seal as with polished but is still giving a major problem is it simply a case of elbow grease and a grout remover or can i prevent it from happening?

Did you seal before you laid the tiles? If not then this may be the problem. Try here for some cleaner and good advice:

LTP- online floor treatment cleaners sealers

Good luck

[guy1976]

you can also use lithofin cement away diluted 1 to 15 parts water

[Wheely]

I did seal before grouting but the grout is embedded in the pits - any advice on removing it now!

I have had the same problem and what made it worse was the colouring in the grout.
The worst areas were where I hadn't cleaned the grout off as well as other areas and then left overnight. These areas were not apparent until the grout had fully dried out.

I ended up having to clean out the dimples using a scribber.

What type /brand of sealer did you use?The problem is if you've used a rather thick sealant such as HG IMPREGNATOR or HG MARBLE IMPREGNATOR,using another product such as HG EXTRA (which is basically an 'acid wash'),it may remove the seal-all depends how porous the tile is to begin with.
Do you know which country the tile was manufactured in?
There's every chance it was manufactured in China or Brazil,two countries which are known for using far cheaper raw materials than Spanish or Italian countries.
It could have been that the tile needed more than one coat of sealant.
This problem is well known with POLISHED PORCELAIN as well.
Basically the more 'microscopic' the powder used when manufacturing a porcelain tile,the less porous the tile will be(cheaper raw materials mean 'chunkier particles' which when compacted and pressed during manufacture,will mean more porosity).
Lithofin is a good sealant,but try and track down a stockist of SOVEREIGN STONE SEALER :It smells like 'peardrops' and is excellent for polished porcelain-the excess liquid begins to evapourate,and once buffed with a dry cloth,brings back the polish!
Sorry,rambling on here,try HG REMOVER with your grout problem mate,if that don't work,I'm afraid it's something stronger......