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<blockquote data-quote="C&amp;amp;K" data-source="post: 482192" data-attributes="member: 30707"><p>When I restored this Alumacraft I used PPG Delthane, which is a two-part polyurethane acrylic enamel, basecoast/clearcoat. But almost more important in painting aluminum boats is the self-etching primer. No top coat will stand up without a proper primer for aluminum underneath.</p><p></p><p>It is not necessary, or even desirable, to paint the bottom of the hull below the spray rails. The 5052 alloy typically used in marine hulls is "self-healing" if it gets a scratch on it, in that the oxide that forms on the surface protects the metal from corrosion. For that reason, virtually no factory-painted aluminum boats are painted below the waterline.</p><p></p><p>[ATTACH=full]108980[/ATTACH]</p><p></p><p>[ATTACH=full]108981[/ATTACH]</p><p></p><p>[ATTACH=full]108982[/ATTACH]</p></blockquote><p></p>
[QUOTE="C&K, post: 482192, member: 30707"] When I restored this Alumacraft I used PPG Delthane, which is a two-part polyurethane acrylic enamel, basecoast/clearcoat. But almost more important in painting aluminum boats is the self-etching primer. No top coat will stand up without a proper primer for aluminum underneath. It is not necessary, or even desirable, to paint the bottom of the hull below the spray rails. The 5052 alloy typically used in marine hulls is "self-healing" if it gets a scratch on it, in that the oxide that forms on the surface protects the metal from corrosion. For that reason, virtually no factory-painted aluminum boats are painted below the waterline. [ATTACH type="full" alt="HPIM1424.jpg"]108980._xfImport[/ATTACH] [ATTACH type="full" alt="HPIM1438.jpg"]108981._xfImport[/ATTACH] [ATTACH type="full" alt="HPIM1439.jpg"]108982._xfImport[/ATTACH] [/QUOTE]
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