You can close a small miter gap by rubbing it with a screwdriver shank or any hard, smooth tool. We used the end of a utility knife. That crushes the wood fibers inward to make the gap disappear. Even professional woodworkers sometimes resort to this.
Our DIY wood crate coffee table! How we did it: We used 4 wood crates from a craft store and some good from the hardware store. First we removed the slats from one side of each crate. Then we cut them down to fit the end of the crate so when we turned