David Lang wrote:
Hi Peter
My friend has an old Victorian house with original quarry tiles in his
kitchen. The tiles are about half an inch thick and he asked me if
there was an easy way to remove stains (mainly fat I think), then
re-seal them.

The problem is probably due to the very porous nature of the tiles. The
fat/grease/dirt has soaked into the tile.

The solution is not mechanical

unless the OP uses one of them there small domestic steam cleaners



RT