Neil,
An interesting thread,
We have used Vikan brushes for several years on our commercial customers and daily since July on all residential. We store them overnight in a bucket of pure water and, touch wood, have not had much spotting to date.
I was sold this Vikan brush twice. Once by a window cleaner who also sells via his shop and secondly by an online window cleaning company.
Am interested to know if your suggestions are confirmed by others.
Regards,
Sarah