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b) victorian mosaic tiles on path infront of house - these are also
worn but are in good condition. I've scrubbed them time and time again
but they need something more to properly restore them.

If they're proper encaustic tiles then the pattern isn't glazed on it's
inset and varies from quite thick to right through. You can get as rough
as you like with it.

--
Skipweasel
Pay no attention to that man behind the curtain.