No i bought one of those hozelock pump action crop sprayer or weed killer things from b&q. It cost £20. I dilute it at 20/1 and leave for 10 minutes or so.
A garden broom and an outside hose pipe could do the job just as good on a polycarbonate roof.
After the tfr is applied and left a little while, it just melts away with a sweep of the brush and water.