Remove the contents from the cupboard shelves and peel off the shelf liners if there are any in place.
Sand the shelves with a fine-grit sanding pad until the finish is slightly dulled. This will allow the new finish to adhere well over the existing finish.
Wipe off the shelves with a tack cloth to remove all of the sanding dust. It is important to have a dust-free surface to apply a new finish.
Brush on two even coats of wood finish over each shelf. Allow the finish to dry for four hours between coats. Wait 24 hours after the second coat before continuing.
Roll out shelf liner over each shelf. Trim the liner to fit each shelf using a utility knife. Remove the trimmed liners.
Peel off the adhesive backing from each liner. Lay the liners on the shelves and press them evenly onto the shelves.