Our garden fence and shed has some algae on it and was not painted for a while. Now the problem is, I like this "weathered" look, yet I think we have to paint it to protect the wood. I read you should use a fungicidial treatmet before painting otherwise the algae is coming back. Did anyone here ever paint without the fungicidial treatment? Will the paint still protect the wood if I do not use the fungicidial treatment. I like moss in the garden and I do not really know what to do with our fence and shed.