My best friend has this super cheap but very good guitar, and always plays crazy flamenco on it. He asked me to do something with it, and this is what I came up with.
I took down the strings, sanded the top surface carefully and drew the design on it with pencil. After that I painted it with bistre pigment, this is easy to apply corrections to, a wet cloth will swipe it off of the super smooth surface and it has a cool water-y painterly feel to it. This fitted the guitar, the person, and the music style perfectly. Some layers of carefully applied wood-varnish later we could go jam on the beach!!! <3