Score Around the Hinge
In our demonstration, we install a simple brass hinge in a piece of hard maple (Image 1).
Use a vise to steady your work as you install hinges. Hold the hinge in place as a template and score around it using a utility knife (Image 2). Score all the way around three sides of the hinge. This will keep the wood from splitting as you chisel out wood to flush-mount the hinge.
To hold your hinge temporarily in place as you score around it, you can apply a drop or two of hot-glue to the back of the hinge using a hot-glue gun. This will steady the hinge without a permanent bond.