This sounds like a beautiful lamp so don't take chances and take the shade off and take it into a VERY WELL KNOWN dry cleaners and have your lamp shade done the professional way. There are several...
I USE KETCHUP TO POLISH BRASS. IT WORKS GREAT.. JUST WIPE ON AND LET SIT FOR A FEW MINUTES(15-30),THEN WASH OFF WITH SOAPY RAG AND RINSE.YOU COULD JUST USE A WET RAG IF LAMP CANNOT GET TOO WET OR...
Use suds on a soft brush to rub any spots lightly. Then dip the shade up and down. When the water gets dirty, change to clean sudsy water. Wash the shade a second time. to rinse the shade, dip it up...
The first step to cleaning brass is to determine whether is it really Tarnish. As time passes by, brass accumulates patina, a form of protective oxidization. If at all, you see is a form of patina,...