Re: Cleaning & polishing "German silver" on metal-body National
Another vote for Simichrome. Used it on my National Style 0 guitar, on resonator coverplates on Dobro guitar/"Dojo"/mandolin, and on a variety of banjo resonator flanges and other metal parts. Used it on brass lamps as well. Seems to clean decently without being abrasive.
I do second mandroid's observation that spit should come off with mild soap and warm water. Of course, depends what you've been eating/drinking while playing...
Gibsn: '54 F5 3pt F2 A-N Custm K1 m'cello
Natl Triolian Dobro mando
Victoria b-back Merrill alumnm b-back
Stradolin Vega banjolin
Sobell'dola Washburn b-back'dola
Eastmn: 615'dola 805 m'cello
Flatiron 3K OM