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Does anyone have a successful way of leaching old impregnated salt from plywood. I have a small area near the bilge on a fore peak bin plywood bulkhead bin that in the past has taken on salt water. Now if I clean it up and varnish in a few months the salt breaks out again.
Currently it is a small area that can be controlled if I could leach the salt out. Any ideas would be very welcome. Vinegar has been suggested as an option.
 

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Once known as Hartley18
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Personally, I'm not sure it's possible to leach salt out of plywood.

I'd think you'd be better off cutting out the affected piece, shaping up a new one to fit and thoroughly sealing it with CPES before gluing it in place. Problem solved.
 

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Cut it out and use new wood.

You'll never draw all the salt out without massive amounts of a solvent. like water. And the fact that salt is migrating out, just means the heart of the wood is still damp, or still getting damp, so sealing it with anything right now is counterproductive.

Cut it out, or seal it (that means front, back, and all sides and edges) in epoxy and then paint it.
 
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