how to remove mold from (old) aluminum (white) siding? Stuck hard.

Over the years, it seems, much of the siding on the always-shady side of the house has accumulated a covering of mold.
It's really stuck hard.
Wife wants it off; what suggestions?
Thanks!
David
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David Combs wrote:

Rent pressure cleaner. Are trees overhanging? i.e. damp area? When clean it may 'look' a slightly different colour to other walls of house? So do the whole side.
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Pardon the late reply ...
Trees not the cause here; is east wall of house, never sees sun.
Pressure cleaner: how many psi? gasoline or electric?
Thanks!
David
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try a product called "Spray_9" works wonders..........

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David Combs wrote:

Beware power washing painted siding, which your old aluminum siding probably is. With anything less than perfect control, it will leave marks on the oxidized surface
pb
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