Sand the entire counter surface with 80-grit sandpaper to remove any existing treatment and prepare the surface for fresh paint.
Wash any sanding dust off of the counter with a damp rag.
Mask off any walls and other areas that you do not want painted with low-tack painter's tape.
Apply a coat of primer to the counter surface. Allow the primer to dry.
Paint a base coat of terra cotta-colored acrylic paint.
Randomly toss fine sand into the base coat while it is still tacky. Allow it to dry for four hours, then blow off any sand that has not adhered to the paint.
Use a sea sponge to mottle on a darker terra cotta color. Allow some of the lighter color to show through. Allow the paint to dry for four hours.
Apply three coats of a food-safe sealer to the entire counter to protect the paint. Allow each coat to dry before applying the next.
Remove the painter's tape.