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if you're using 3000 it should be just right to do that in one hit and then wash at this time of year.I have ordered the ramondi sweepex. Doing a 30m polished porc floor next week so will give it a go there and report back.
Unless your using an s2 adhesive I'm not sure that you'd need an additive in the groutLet's hope so! With it being polished porc, it's recommended to use flexmaster additive with the 3000 to help adhesion to the polished edge of the tile so might take a little more washing off.
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