I made the water faucet with procedural dirty metallic material.
The dirt could be rust, but I originally wanted to make toothpaste dirt on water tap hanging above lavatory sink.
The image below shows food faucet, with left handle for Ikura(salmon caviar), and right handle for soy sauce to make Ikura rice bawl.
It’s not so unrealistic because there are already faucets for soup-supply in reality —Now you can get soup straight from the faucet.
Of course, it can be used for other object, as dirty metallic object.
Download the file: