Thanks fellas, ive just cleaned one (glass roof) used my optiloc extention pole with soft brush covered in ecover (ecover and water in a square bucket, lots of ecover to get the crap off the roof) - rinsed it off with a normal hose and then used a normal applicator (Tbar and applicator) to give it that final scrub. Managed to squeegee it off (just) and it looked great, a few drips but client wasnt bothered as it looked like new (her comments).
Not as quick as wfp im sure but still a great job.
Cheers
Steve
Note: I have an adjustable T bar, which worked really well to get into the narrow parts of the connie roof, now need an adjustable squeegee handle i feel to do the same (bit like a wagtale but one that will fit onto unger pole - any ideas or links appreciated)