Removing moss from window seals

My car is left outside on a daily basis. As a result the window seals have gone green with moss growth. How can I clean this off with out damaging the bodywork?

Asked on 19 April 2016 by Steve

Answered by Honest John
See an old Backroom Forum thread: www.honestjohn.co.uk/forum/post/index.htm?t=24345
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