- 1). Fill the seam joint with wood putty. Using your putty knife, smooth wood putty over the beadboard seam until it is even with both sides of the adjoining pieces of beadboard. Let the putty dry.
- 2). Sand the covered joint with 220 grit sandpaper.
- 3). Wipe down the seam with tack cloth to remove the dust created by the sanding.
- 4). Refill the joint until the dried putty is even with the adjoining pieces of beadboard. You may have to do this a couple of times because wood putty shrinks as it dries.
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