W
Welshwizard63
Hi I recently bought polished porcelain black 300 x 600 tiles for my kitchen and had them professionally laid with all the recommended bal products flexible fixative and grout stripper and sealer.i was advised to cover in jewson light weight adhesive plastic sheet on a roll and cordex corrugated sheeting whilst the kitchen was being fitted. Now fitted the protective covering has been removed there are dark black streaky lines all over the surface of the tiles.note the tiles were sealed before and after grouting.i have tried to clean the tiles with the recommended stripper but no joy .any ideas where the streaks may come from ,I have contacted topps tiles but as yet no one has come back to me .any ideas would be gratefully accepted.WW