Hello:
I don't know where you are, but I've seen here in the US a gun that is
hooked up to the water hose; that gun has something in it that will remove
the minerals and all the stuff that is in the water.
I saw the commercial some years ago; however, I don't know if they still
make or sell that gun.
In the meantime, I would recommend to buy one of those 'shammy' cloths;
the more expensive, the better for spot-free car washing.
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<jim> wrote in message news

q81j0dsdvlin778rcg71pba08hl6hd2du@...
> I recently saw a diy tv show where they said for water spotting on a
> car to use water with vinegar. I don't recall tho if they said to wax
> afterwards. Does anyone know if vinegar and water mixture takes the
> wax off the car ?