Removing excess glue when assembling parts is messy and risky. If you leave the slightest residue, it can seal the wood and block stain penetration, resulting in a blotchy finish. Here's a simple way to avoid the problem. Cut 18 " grooves 18 " deep 18 " from a part's edges on its glue surface, where shown at above right. Then, apply glue to the area between the grooves, and clamp the part in place. The grooves will capture the excess glue, preventing it from oozing beyond the part's edges.