Thanks for the great recommendation! With a whole 5 minutes worth of elbow grease, this is what I was able to achieve with the Purple Metal Polish on my 5 year old bird that has been completely untouched:
Like better than brand-new!
I'm on a slippery slope now ordering some Nuvite F7 and C compound to help buff out some slight surface corrosion. The warning label is 100% correct on the bottle - "Results May Be Addicting!".