Cleaning vintage integrated amplifier


Looking for some advice on cleaning my Denon PMA-757. I finally got it connected to my second system and it sounds fantastic. However, I'd like to clean the silver faceplate a bit. Over the years, it's turned from a champagne/silver color to an antique gold color. Any suggesting of cleaning products to get her shiny again? Thanks so much! 
bluorion
Use SprayAway glass cleaner, it is a water based cleaner and will not dissolve the silk-screening on the faceplate. Apply with a toothbrush and wipe off with a cotton towel or diaper. Depending on how dirty it is, you might have to apply and remove several times.
@dill Thanks so much---will give it a try. 
Test on an inconspicuous part in case it doesn't work. 
If that does not work use CRC Brakleen in the red spray can. It will work.
Do not use CRC Brakleen, it is mostly acetone and uses carbon dioxide as a propellent. Likely to take everything off the faceplate.