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Corrosion:

If you see white dust around your battery terminals, you must clean it to prevent further corrosion. When removing the clamps from battery terminals, always remove the negative terminal last, or only that terminal if just one is removed.

Remove the battery from its tray. Remove the tray. Brush all dust from the battery and tray. Use a battery brush cleaner on any terminal previously affected by corrosion. Then sandpaper it with light-grain paper.

Use baking soda (bicarbonate soda) and warm water on the white dust areas - it will react with it and deacidify it as it is alakaline. Wash all areas with plain clean water. Dry with a rag. Do all of these steps on the battery (full case), clamps and tray.

Use Lanolin or another anti-corrosion spray on the tray, terminal posts and clamps. This will help fight further corrosion from reappearing.   [guest]

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If your battery's tray is rusted, corrosion is more likely to occur.

To repaint it, first buy another exact same type of battery tray from a wrecker. Wirebrush it preferably with a drill and wire brush attachment, sand it down by hand and rust convert the bare metal immediately (and never forget to clean off the rust converter with the recommened materials). Then use etch primer followed by primer surfacer. Follow that with several topcoats and maybe a few clear coats. Allow to set for 7 days before installation. Lightly spray an anti-corrosive spray with lanolin on both sides before installation. Use gap filler for the underside where the bolts go through.   myxlfidian (150)

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