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Old 07-30-2006
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Question Repainting aluminum spars

I have purchased an old (20+ yr old) boat. The spars are badly corroded around all the fittings. We would like to salvage them and repaint. Problem is how to properly clean out the corrosion without damaging the metal, any suggestions?
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Old 07-30-2006
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SS Brush

Small stainless brush along with typical scraping and picking tools. Don't worry too much about getting every tiny bit of the white powder as it does not seem to promote a return of the corrosion quickly as rust on steel will.

I have had good luck with a variety of primers on boat alum: (A) the urethane based Petite 'Rust-Lox' and (B) Porter U-Prime (AKA:PorterPrime) #289. Just be sure to have the metal degreased ( warm soap and water scrub ) and dry when you paint and all should be well.
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Cleaning aluminum spar

Try lemons and salt, cut lemons into a bucket add salt and let sit overnight. Scrub the aluminum with the half lemons and salt slurry. Works great on commercial kitchen pots, and all unfinished aluminum surfaces.
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