How to Build Custom Speakers

Step 18 Sand the edges smooth

After all the glue has dried, there will likely be a small amount of hardened glue that was squeezed out by the clamps. Use a power sander to take this off and sand all edges flush. Try not to sand off too much, since the more that you do, the more out of true and square your cabinet becomes. Also, be careful to sand only one surface at a time and never round over the corners. You'll want those crisp lines when you apply our finishing material.