I've sanded down the exterior of my Natty helmet so that all the flash is off, used my Dremel to sharpen all the edges, and filed out the keyholes in the back.
However, there is that lumpiness problem across the top of the dome. I'd like to take care of that before proceeding.
Brak's mentioned something about Bondo, but I really have no clue where to begin.
Can any of you Natty vets help a dude out?