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All finished now, and it looked very clean and sparkly once I'd finished.
It was a bit of a pain trying to get rid of the cif, as I think I used a bit too much and I ended up with a very chalky floor. Would have been ideal to just get the garden hose on it, but not very practical so had to rely on lots and lots of buckets of water and a mop!
Anyway, it's all done, and my arm is KILLING... so no, I won't be doing anyone else's thank you very much :-)