It is likely a misspelling of one of the following words:
* Tarnishing: This is the process of becoming dull or discolored, often due to oxidation or other chemical reactions. It is commonly used to describe the effect on metals like silver or brass.
* Furnishing: This refers to the act of providing or supplying furniture, equipment, or other items needed for a particular purpose, such as a home or office.
If you can provide more context, I might be able to help you figure out which word was intended.