As abpve with a double rinse depending on how dirty, one of them with straight tap water for frames and panes and sills. Then rinse later with RO using a soft filament brush thats not stiff and can cut into the glass corners etc. Possibly doing the panes in horizontal rows leaving a bit of time between each row. If the jobs a prestige one do the bottoms trad till you have the customer hooked. Pointbout the benefits of the windows staying cleaner longer.
Has the client seen you using a wfp before ? Is sea salt an issue ?
Thanks for all the tips you guys have posted!
Jeff,
They have never seen me using wfp before and sea salt isn't an issue.
I forgot to tell you all that the windows on two of the houses are only 2 years old and paint work is very good.
You mention doing the downstairs trad to begin with! I agree with you and I don't! It would take me ages to trad the bottoms on my own!!!!

I cant afford to spend too long on this job as I need to keep up with my regular work and I'm all ready behind this month as the weather hasn't been too good up here but at the same time I have to do a GOOD job for them.
you will need a rectangular brush to get under the top sash & right into the corners, an oval vikan won't cut it for these type windows.
tony
Tony,
I have a rectangular vikan

Was thinking of using my 18ft facelift but will swap it for my unger and rectangular vikan. Oh.... as I was writing that I just remembered that cleantech do a adapter for the facelift so it will take a vikan brush!