Wipe up spills immediately. Moisture is not something you want to allow to linger on the butcher block, as it can cause damage.
Clean stains using a damp cloth and dry thoroughly.
Apply a coat of mineral oil to the finished butcher block surface with a cloth every four to six weeks. This will work to protect the surface and finish by keeping the moisture barrier intact.
Rub minor scratches and dents with steel wool (a fine-grit sandpaper of #220 can also be used). Be sure to rub with the grain of the wood.
Wipe the dust from the butcher block.
Brush on a uniform coat of food-safe clear lacquer finish to the area that was sanded.
Wipe the excess from the butcher block using a cloth.
Allow to dry thoroughly before using the butcher block. If you prefer, you may add a second coat after allowing the first coat to dry for four to six hours. Twelve hours is the total drying time when two coats are applied. If applying a single coat, allow it to dry for at least six hours prior to using the butcher block.