First of all there is a lot of nonsense spoken about porcelains, yours may or may not be sealed, sometomes the shops selling them do not really know, butlet us assume that youare correct:

OK, start with the least aggressive, try a mild cleaner with warm water, somthing like Concentrated Tile and Stone Cleaner. Scrub with a white pad, rinse and dry.

Another route would be to try somehing like Microscrub (http://www.allforstone.co.uk/product.asp?strParents=&CAT_ID=&P_ID=417) try this on its own or in conjunction with the mild cleaner. Neither of the se should harm any sealer.

if you have to go stronger them use a high alkaline cleaner but this may remove some sealer.

Hope this helps

Ian

if that does not work, then try a high ph/alkaline cleaner -

I have been told i need to remove the wax coating from the porcelain tiles i have bought (60x60x10mm), i have also been told they are sealed and i dont need to seal them.

My question is what to use to get the best results in removing the wax but also to ensure i dont remove the sealer (i dont even know if that s possible) any advice appreciated.

You have a residual coating of some kind on your tiles. This has been partially removed (or not evenly applied in the first instance) possibly by the tiling, grouting and clean-up process.

The coating could be either a transit wax or some kind of factory-applied sealer. Let’s hope it is the wax as it is easier to resolve usually. Obviously a wax or sealer would act just as you have said, and prevent water from getting in and ‘wetting out’ the tile surface. I the parts of the tile that do wet out are anything to go by, then the tile most certainly requires sealing for stain protection, but you will have to remove all trace of the transit wax first.

These waxes can respond to different types of treatment but most will be removed quite easily with a high alkaline cleaner/detergent (degreaser) so try that first. Failing that, you may try a scouring creme or even a solvent (like acetone). Do some tests and see if it comes off.

Once you have removed the wax, the tiles will need a good quality, (probably solvent based due to the surface tension of the tile) impregnating sealer.

Try this first and come back to us if you have a problem.

Hope that helps
Ian