04-07-2008, 04:28 AM
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Deity
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Join Date: Jul 2004
Location: Saint Regis Falls, NY, USA.
Posts: 3,346
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regular ol aluminum siding? bare metal? you can try vinegar on it. this will dull the finish. muriatic acid may do the trick. you got to find something that will oxidize the surface. aluminum naturally ages forming an oxide that protects it.
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