This is from a textbook "English Grammar in Use". There is a sentence *"Can you smell paint?"* 

The usage of "smell" is: 

1. I smell of roses.
2. It smells nice.
3. I can smell that something is burning.

These three are what I understand so far. Then how about this sentence? I checked "paint" in a dictionary, but it has verb and noun. So I'd like to know the structure of this sentence.