The biggest thing I have learned is to test everything on scrap material before you do the task on the actual guitar.
It's a pain, but better to find out that your drill with a larger bit corkscrews through pick guard material leaving a chewed up mess, or your stain of choice doesn't apply evenly etc etc on scrap material than ruining your project.
It's a pain, but better to find out that your drill with a larger bit corkscrews through pick guard material leaving a chewed up mess, or your stain of choice doesn't apply evenly etc etc on scrap material than ruining your project.