[steveo22]

I did a Fascias and Soffits clean the other day and although i got the dirt off ok, i was left with some really nasty looking stains, crusty like limescale. Used my normal TFR but couldn't budge it?! Anyone experienced this? I must have done at least 50 of these type jobs, but never had one like this??

[andyM]

Was it Lichen?

[Dave Willis]

I've had those stains, nothing seems to shift it including Viakal.

[steveo22]

Not sure what Lichen is? if it is, what shifts it? I'll try and get some pics of it on here!

[andyM]

Lichen is a crusty fungus usually a grey or green colour.
Quite common on conservatory roofs but not seen it on fascias before.
As I say im not sure if thats what you have got on the fascia but on conservatory roofs you need to give it a good soaking with plenty of tfr and it takes loads and loads of scrubbing with a mono brush to remove it.

[richard jagger]

its not lime scale as lime scale will just rub off.The are many deposits in water calcium, nitrates ect.try adding borax to the cleaning you would normally use its a power and a few spoons should do the trick if you soak it.Brush with a stiff brush and rinse with pure.