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lincolntiler
Hi everyone, I've just laid a light grey matt polished porcelain floor for a customer and was daft enough to use charcoal grout (never again!!!!). Some of the tiles have 'grubby' marks on them as if the muck went through the sealer (I sealed them with the right stuff the night before laying). I've asked Darren at NETT and he suggested asking you guys for any advice on how I can get rid of the marks and what the hell did I do wrong? Any ideas?