Clean your butcher block with warm water and mild soap.
Allow the butcher block to dry, wiping moisture away with paper towels.
Pour mineral oil onto a rag and then sponge the oil onto the butcher block.
Allow the oil to dry (about 15minutes).
Repeat steps three and four until your butcher block doesn't absorb any more oil.
Wipe off excess oil that has not been absorbed using a clean rag.
Treat your butcher block with oil at least once a week.
Sand any scratches using steel wool or 220 grit sandpaper until the surface of your butcher block is smooth and then clean the block with mild soap and water. Dry thoroughly.
Apply a thin layer of Tung oil to the surface of the butcher block using a sponge. Allow the Tung oil to soak into the butcher block for about 45 minutes.
Using a 220 grit sanding pad, sand the oil dampened surface. Wipe off remaining finish with a clean rag.
Rub the butcher blog vigorously using a clean rag until the Tung oil is completely absorbed into the wood.
Leave the butcher block overnight before using again. You may have to repeat process, as several coats are often needed when the butcher block is new or very old. Allow 24 to 48 hours between coats to cure the finish.