[drive surgeon]

every job im doing at the moment is infested with lichen,  its a nightmare to get off, turbo is no good on massive areas.  i no you can get chemicals but with plants and grass its not easy, anyone use anything good.

[drive surgeon]

no one removed lichen before?

[cactus11]

I found this on the net .......

A homemade poultice an be produced using Dry porcelain clay mixed to a peanut-butter consistency with equal parts of water and glycerin. Small quantities of glycerin are available at most pharmacies; for larger quantities, search the Internet for soap-making supplies, floral supplies, etc. or check your Yellow Pages for "soapmaking supplies"; the large craft stores might carry it as well (Michaels, Hobby Lobby, etc.) Just be sure to stay away from "glycerin melt-and-pour" soap base. You'll need straight glycerin (you'll mostly likely find "vegetable" glycerin). Please be sure NOT to ask for NITRO-GLYCERIN. You will have every law enforcement agency in the country checking your personal history and watching your every move.

[Londoner]

Lichen is a pain. On a conservatory roof you have to scrape it off, no amount of washing will move it. It has a hard "shell" on the outside, once you get through that you are OK.

[BDCS]

glycerin can be obtained at bio diesel depots - not sure about the poltice thing though. I have just put my ipod on and struggled - have you tried heat