Cleaning fireplace castings
I have an older home that has 4 coal burning fireplaces that have been sealed off. Covering all of the fireboxes are heavy ornate casted plates(my guess is that they heated up from the fire and help heat the rooms). They appear to be of either brass or bronze.
My question is. What can I use to clean the tarnish off of these to try to bring out the detail in these.
I belive that they are original to the house circa 1889.
Thank you in advance for any feed back/remedies.