I have a 2017 Fender P bass MIM with Pau Ferro Fret board. I actually like the color and the grain, but it is just very dull finish - no depth to the grain. I tried Fret Doctor and Lemon oil, but they didn't change it much if at all. I know time will probably darken and it will eventually get more of a sheen. But, any way to speed up the process?