Refinish Knotty Pine Lumber

Knotty pine lumber helps to create a rustic appearance in a home. The wood is characterized by large knots with a uniquely attractive pattern. It is a good material for floors, walls, paneling and furniture. It is important to properly maintain your wood to extend the life of the lumber. Refinishing your lumber periodically can restore the natural beauty of the wood. See the guide below to refinish your lumber.

Materials Needed

  • Mineral spirits
  • Lint-free cloth
  • Orbital hand sander
  • Sandpaper, 100-grit and 50-grit
  • Water-based stain
  • Staining sponges
  • Paintbrushes
  • Tray
  • Water-based polyurethane
  • Painter’s mask
  • Dust mask

Step 1 – Wipe down the Lumber

Place a small amount of mineral solution onto a lint-free cloth. Use the damp cloth to wipe down the surface of the lumber. This will clear any accumulated dust, dirt and oil. Larger surfaces require more patience and time.

Step 2 – Sand the Lumber

Wear a dust mask to prevent the inhalation of dust when you sand. Attach the 100-grit sandpaper onto the sander, then sand over the lumber. Take time to sand over the entire surface well. Properly sanding the area will ensure that the wood absorbs the stain properly. The knots tend to absorb more of the stain than other parts of the wood. Fold a piece of sandpaper into half. Use this to smooth the nooks and crannies and other difficult to reach areas. Use a clean, lint-free cloth to wipe away dust from the lumber.

Step 3 – Apply Stain

For small areas, it is best to use a staining sponge. Larger areas require a paintbrush. Place about 1 tablespoon of stain onto your sponge. Wipe stain onto the lumber in the direction of the wood grain. For a paintbrush, pour some stain onto a tray then dip your brush in the stain. Brush a light coat of stain onto the lumber. Use smooth, long strokes for even application. Allow adequate time for the stain to dry completely.

Step 4 – Smooth the Lumber

Use 50-grit sandpaper to lightly sand the lumber. This helps to get rid of raised wood dust that may appear in the dried stain. Clear the dust with a lint-free cloth. Next, follow the directions in Step 3 to apply a second coat of stain. You may wish to apply more than 2 coats to achieve your desired depth of color. However, keep in mind that pine lumber tends to darken with age.

Once you are done, allow an adequate amount of time for each coat to dry well.

Step 5 – Seal the Lumber

Be sure that your work area is well ventilated. Wear a painter’s mask. Apply polyurethane over the entire surface of lumber. It is best to apply a thin coat so that the coating is properly absorbed. The sealant helps to protect your pine lumber from moisture and makes it durable and long lasting. It is a good idea to apply 2 coats of sealant. Allow adequate time for the first coat to dry completely before you continue with the second coat.