Outdrive Scum...cleaning?

TeamGl@stron

Cadet
Joined
Jul 26, 2010
Messages
7
My outdrive is caked with algae and scum from sitting in the water (fresh water) all season. Power washing did not remove everything. Can someone tell me the easiest way to get this clean without damaging anything?? I have heard using CLR, hydrogen peroxide, and muriatic acid all work well. Any help?
 
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