To refinish your premium walnut or maple cutting board/block, you will need the following materials:

• Fine-grit sandpaper (400 or 320 grit)

• Medium-grit sandpaper (120 or 150 grit)

• Mineral oil or butcher block oil

• A clean rag or brush

Steps:

1. Start by sanding the cutting board with medium-grit sandpaper to remove any surface scratches or stains.

2. Follow with fine-grit sandpaper to smooth out the surface.

3. Clean the cutting board with a damp cloth to remove any dust from the sanding.

4. Apply a generous amount of butcher block oil to the surface of the cutting board, using a rag or brush to evenly distribute it.

5. Allow the oil to soak in for at least an hour, then wipe off any excess oil with a clean rag.

6. Repeat the oiling process until the cutting board is well-saturated.

7. Allow the cutting board to dry completely before using it again.

It's important to note that you should reapply the oil every few weeks or as needed to maintain the board's finish and to help prevent cracking.

Repeat the full process every few months or whenever needed.