Brass/Nickle Finishes: Tarnish Cleaning/Prevention
 

Can someone suggest method and protection for anti-tarnish treatment
of (satin) brass and (velvet) nickle finish (bathroom plumbing trim)
areas ?

Have read that a non-abrasive polymer-based automoble wax or
"Carrubba" should be applied prior to installing new brass. Any
suggestions for brands to use/not use ?