Break off the carnauba wax with a chisel or utility knife and melt the carnauba wax until it dissolves into a solvent. Let the carnauba cool a little, but don't let it harden too much. It should be just cool enough that you won't burn yourself by touching it.
Wipe off the surface of the bare wood with a cloth.
Dip a small paint brush into a can of paint thinner and apply a small coat onto the wood. Let the paint thinner dry completely before applying the wax.
Dip a clean cloth into the carnauba wax and apply a thin coat on the wood. Make sure the coat is evenly distributed.
Buff the wood with a clean cloth to bring it to a shine.
Reapply a second coat of carnauba wax, and buff after the second coat.
Apply pure tung oil or other finish to maintain the glossy shine and protect the carnauba wax polish.