How do I fix gaps in mitered corners?
The mitered corners of a box I made opened up slightly at the points when I glued it up. Is there a fix or is it too late?
—Peter Burrus, Galesburg, Ill.
Don't panic, Peter, we've got a fix for you. You can close minor gaps by rolling the corners with a screwdriver, as shown above. This technique bends the delicate fibers at the corners to cover the gap. Finish up with a light sanding to remove any unevenness.
To prevent this on future projects, follow the tip below to create angles that meet perfectly. Then use a right-angle brace to guide the glue-up, eliminating any sloppiness introduced by uneven clamp pressure.