You can ponder on and on about who he's referring to that "spit shined his corroded halo". Someone (or something) came into his life and uplifted him. But, it throws me off about it was packaged away, and was left to decay. Maybe the narrator was uplifted for a certain amount of time, but it turned out to be short-lived, because someone/something left his life... leaving his halo to decay.
You can ponder on and on about who he's referring to that "spit shined his corroded halo". Someone (or something) came into his life and uplifted him. But, it throws me off about it was packaged away, and was left to decay. Maybe the narrator was uplifted for a certain amount of time, but it turned out to be short-lived, because someone/something left his life... leaving his halo to decay.