Wow! That's quite a difference, Drew.

My routine is very simple, but effective:

Two wet patches wrapped around a bronze bristle brush run through a couple times.

One dry patch.

Electric drill with bristle brush wrapped with Big 45 Frontier Metal Cleaner run back and forth a couple times with special attention to first 12" and chokes.

One wet patch.

Dry with one patch.

Finished!

Total time 5 minutes.

When an old man dies a library burns to the ground. (Old African proverb)