Not sure where to put this...

Jacob Ward

Cleantalk Member
I'd say a day

I'd you can get water up there you ok only need say 9 meters of high pressure hose to get to everything.
Hire a tower scaffold but you will only need 1 story I think

You could jet with a pole system to wash off
But you need to apply chems and other processes first so a scaffold is best.

You really need to know what you are doing.