Build an Under-Window Bookcase

Now that the woodworking is completed and all nails are set, we move on to sanding. Begin by sanding the entire unit with 100-grit sandpaper, followed by 150-grit and finally 220-grit. Wipe down the unit with a clean cloth.

Then, using a putty knife, fill each nail and screw hole with a stainable wood filler. Pack the filler tightly into each hole, leaving a bit of excess outside of the hole to allow for shrinkage.

Once the filler has dried completely, sand it flush.

Tip: Be certain to sand enough to remove any filler that may have seeped into the wood around the hole, as this will show a discoloration if you choose to stain the piece.

If any holes need to be refilled due to shrinkage, fill, wait for it to dry and sand again.