How do you remove the coloring off the feigao?

My maxx is made of all silver, clear anodized (so it's not conductive) aluminum. The feigao motor really sets off the vibe with its color. I was wondering if there is anyway to remove the coloring off the can?

I came up with two strategies, but none actually work:
1. Sandpaper. If i sanded off the coloring, wouldn't the metal shavings get into the motor and become a grinding component, or even worse conductive?
2. Easy off oven cleaner. I use this for almost every part that i want to take the anodizing off of. But if some got into the motor, it would eat right through the wire insulation, and short circut the wires (since the metal is touching each other)...Right?

Thats all i can think off, i think option # 1 is my best bet, but both seem like they can harm my motor.