So your agenda is to promote a chemical which by your posts indicate may effect the plastic because you won't name it ?
Or more cynically wish to sell it on at a profit ? Which isn't a problem either
Lichen is always hard to remove with or without chemicals by only using a brush.
I found that a nice piece of planed wood much better that all that scrubbing used with running water then I had a car port 40 foot by 15 foot ( totally covered in lichen) so I converted the end of my water fed pole to take a squeegee and hey pesto job. Done in under 30 mins
As for quality of service once the roof is clean and the lichen is removed I have done what the customer has paid for a clean roof won't have any spores on it - they usually come from nearby trees or off lichen still growing on roof tiles
Just offering my experiences on the subject
Darran
agenda is to promote the chemical, i never reccomend anything untill i have tried it myself and made sure myself that it dont cause damage. which it should do as they use it on food plant machinery that has metal, plastics and rubber maybe glass depending on the machine i guess.
any salesman can tell you what you want to hear, but me like i like try it first and see for myself.
yes i am hoping to supply it to. hence why i really want to give it a good testing.
with this the lichen was easy to remove, sprayed it on, waited and could rub off all of it with finger without much pressure, witch also kills any roots that are left behind within any scraches, or rubber seals, screw etc.