That cut, if it was hidden, would be fine and if it is on showNo joy with the score and hammer.
Even the tile that I broke cleanly along the line, left the tile with an edge that needed a grinder on it.
16mm tiles so the likelihood of it working perfectly were pretty slim. Worth a shot though.
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then as you say it will clean by running a grinder along it. I
still think it saves a lot of work and a lot less dust. Just my opinion