I'd imagine a Dremel was involved, but other than that, I'm clueless and in awe.

www.plurk.com/Cyberpink Not quite a dremel but the same idea. It's a jewelers flexible shaft tool. Dremels are really large for my hands.

www.plurk.com/fretwerk I keep threatening to make a video tutorial.

www.plurk.com/fretwerk It's really a matter of practice. I suppose a restoration degree helps since I already knew how to best manage the tools but mostly just practice.