Thank you Steve and Ray.
I washed down the glass this morning and most of the specks are gone. I do it at the shed which is about 100m away from the house, that's where the boss wanted it. I don't have a warm water tap, I could heat water in a pot, but that seems a little too much. So I will just let it dry by itself. I could buy a hairdryer, that might work. What do you think. I need one anyway when I silver the mirror.
At the moment, I think that it needs at least another 3 sessions of polishing to get it fully polished out. The fringes are not really straight, I will see if they are getting worst after another session. Before I start polishing again, I will cut the hole in the centre. Plan to use a little dam of blue tack for the water and cover the glass with a couple of layers of glad wrap.
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