MatthewC
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JoceAndChris said:...It looks like you've got some super old floors there, so , an early plea that you restore them as they are. For those kitchen tiles, I'd recommend a hard brush ( I use small steel brushes on mine to get the efflorescence off), and then a good clean, followed by 3 coats of Liberon stone floor sealer ( a linseed oil mixed with a carrier) and 3 coats of Liberon stone floor wax - it's great for quarry tiles, flagstones, pamments, and it's easy to use. I think they'll come up a treat.
I certainly do intend to keep the floor tiles if I possibly can, but a quick go at a bit of scraping yesterday has rather discouraged me. The floor has been covered by various things, and the only good tiles are near the edges where I think they were once covered by kitchen units. In one place there is newspaper with something thick and black underneath - the paper is dated 1970 and 1972! Elsewhere there is the remains of hessian backing (from lino/plastic covering) and, again, something black and nasty underneath. It is possible that under the black they might be OK... In very damp places such as near the external walls where the ground outside is/was too high, the red ones especially seem to have lost their surface which has bloomed in a big way and destroyed he surface of the tile (is that your "efflorescence"?). It seems to me that if you remove that white dust, all you have is a very rough surface. Would a steel brush really help there?
They look past it to me, but I will persevere for now - although I would not like to spend hours on it only to find that I've been wasting my time. I'm certainly open to suggestions for removal of the black stuff - what do people use for scrapers? Will a metal scraper or a Stanley knife blade damage the tile surface irreparably?