[sdiy] Front Panel Polish? `~~`

[Casio Rapman]

I've got a couple synths with metal surfaces where the majority of the 
surface is shiny but there are a few dull spots as well as a few scratches.  
Some of these are on the front panels where there's lettering, some aren't.  
What do you guys recommend to restore things so they're nice and shiny / 
looking like new?   I notice a wipe with windex makes them look great.... 
til the Windex evaporates.  Is there some kind of really safe metal polish I 
could use that won't effect things long term and won't come off when you 
touch it?

Thanks!

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