porcelain tiles showing some mottled marks after cleaning?

[xelaris]

I'm a bit worried that a cheap deal from ebay is proving to be more costly than expected...
The tiles were looking amazing initially but after using a Swarfega hand cleaner on them some mottled mark started appearing from nowhere - the tiles are dark grey and the marks are lighter - it appears that porcelain tiles are coated with a wax layer....could be this a case where the mild abrasive action of Swarfega has removed the wax in certain areas? If so, and if indeed the tiles are covered with wax, shall I keep cleaning in order to remove the wax completely? Or shall I re-wax the tiles?
These are Porcelanosa tiles and should be of good quality....the marks don't look like scratches to me but these are visible.

 

[DHTiling]

Some polished porcs do have transit wax on them , ring porcelenosa and give them the tile name and they will let you know.
But by your description it is transit wax and that needs to be removed and then the tiles sealed.

 

[xelaris]

Some polished porcs do have transit wax on them , ring porcelenosa and give them the tile name and they will let you know.
But by your description it is transit wax and that needs to be removed and then the tiles sealed.

I've contacted Porcelanosa....they say to contact the one who sold the tiles to me (as to say: "you aren't covered and we got no time for you cos' you bought them from eBay and not from us directly" (bugger)....can't contact the guy from eBay right now.
So, I started to wonder whether this marks are removable at all - these are really stubborn and any attempt proved to be pointless (I'm going to try some alkaline solutions properly made for the job)....could these be "scratches" which have been covered/waxed by the ebay seller? So, cosmetic wax instead the wax normally associated with porcelain is a protective one applied to the back, which sometimes shows also on the front of the tile.

 

[Marksmithtiling]

Before using any products not designed for the job go to a tile retailer, with an offcut or spare tile,and show them, they will be able to supply the correct product.

 

[Tilerbhoy]

Any pictures off it?

 

[AliGage]

Are these polished porcelain tiles then?

If so was the tiles cleaned/stripped of the transit wax prior to grouting?

 

[xelaris]

Are these polished porcelain tiles then?

If so was the tiles cleaned/stripped of the transit wax prior to grouting?

These are matted dark grey (Porcelanosa Urban range - model: Graphic Nature.

The marks appear randomly on the surface mostly grouped in an area but often away from the border and so I don't think this has anything to do with the grouting - beside the grout is black and the marks are lighter than the tiles' dark grey...

I'll see if I can take a picture of the problem....

 

[AliGage]

I picture would perhaps help a little. Looking at the Porcelanosa website these tiles have an effect that you're describing, from the picture. Maybe these specs were masked by grout residue in the first place?

 

[mz30]

Theres no transit wax on them tiles i use them all the time,but graphic nature are black not gray and when water hits them they tend to leave water stains ,they are a pain to keep clean,just out of intrest why did you use swarfega on them?

 

[xelaris]

a few picture of the problem....the mottled marks are quite visible.