It seems that it would help to have a coating that prevents passage of the air - just as painting a piece of steel slows the rusting process. The water in the air would not be able to reach the acacia wood, and also any wood-eating microbes would not be able breath or cross the gold barrier. I suppose termites would be unaware of the tasty wood beneath the gold coating if the coating was airtight?I would say no. And then only exposed surfaces would be covered. It is not a preservative.
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