It should also be noted that the handle is not lacquered, it's a resin impregnated laminate (usually made with Birch veneers) called DymaLux (aka Dymondwood). It's pretty bulletproof stuff in what it can stand up to.
I've used Flitz and Semichrome polishing paste to keep the brass shinny, and the handle didn't even blink an eye, getting some exposure to the paste. In fact, if the handle should get scratched, they can be buffed out with a polishing paste like Semichrome.
Also, the black spacers are not rubber, they are a black phenolic resin... and they will also stand up to Brasso and other polishes.