It may have residue from the blue protection film on the surface of the stainless steel. You can use the cleaner or metal polish to get rid of the residue.
The spring metal clip may have rust on the surface, but will not affect the installation. It can be wiped out easily with a wet clothes or WD-40.
Sell AS-IS.
Please be careful when you place the order as this is a no return item unless it doesn't match the listing descriptions.