Here is a recipe for a nice all-purpose metal polish cleaner.
1/2 cup isopropyl alcohol (70%)
1/4 cup household ammonia
1 cup diatomaceous earth
1/4 cup water
Combine alcohol and ammonia in a clean jar. Add earth and stir or whisk until smooth. Slowly add water, stirring until the solution resembles a thick cream.
Before using, shake or stir well. Clean by applying with a soft, clean cloth, rubbing well. Allow solution to dry, then rinse thoroughly with water. Then polish with a clean, dry cloth until surface is dry.
Note: Because silver is soft, you should not use this polish & cleaner on silver and other soft metals.