got a job cleaning canopies & guttering above shops in my town centre, the guttering is no problem but most of the sheets above the shops are clear perspex sheets and there is quite a bit of pigion s**t on them, will a 50-50 mix of hypo chlorate sprayed on left for a while then low pressure washed off get them clean, the sheets run away from the building so all debris will run into the gutters, we will cover the down pipes so nothing goes into the drains then bag the debris from the gutters for safe disposel, it's a council job so needless to say i have all the health & safty gear in place.
thanks