Combine one cup of extra-virgin olive oil with ½ cup of freshly squeezed lemon juice. Mix together in a bowl and dampen a lint-free cloth into the mixture. Wring it out well, and rub it directly onto the wood in circular motions.
If you are polishing a small item, you can adjust the quantities but keep the ratio the same. For instance, simply mix ¼ cup of olive oil with ⅛ cup of lemon juice.