I have not tried removing the lettering from a P2K hopper - having said that ...
My go to method for removing factory lettering (which is an ink, not paint or decal) is
isopropyl and rubbing with the side of a round toothpick. It has never failed to remove
the lettering and rarely affects the base color underneath. I usually flood the area
with water or isopropyl to get all of the residue bits off. And I let the first applications
of isopropyl sit on the model "until they start to evaporate" before using the toothpick.
Rarely takes more than 2 or 3 tries - always works "eventually". I don't consider
this task to be "quick" but it is easy enough and always works.
- Jim in the PNW