I've got a trick that might help you there. I run across this all the time in my line of work repairing guitars. I regularly have to drill holes into a finished instrument for a variety of reasons without chipping the lacquer. To do this you can at slow speed run the drill bit in reverse where you intend to drill your hole. This will dish out the area and scrape away the finish without chipping it. Once you've got a little dish started run the drill in the normal forward direction at normal speed to drill your hole. Easy peasy lemon squeezy.
Originally Posted by JonM
I would advise practicing this once or twice on some scrap material just so you get a feel for it but this works great.
TOFLAC-U, AOM, LEMS/ Stay back! I have a Merkur, and I know how to use it!