He's going through a bad/difficult/rough 'patch' [='spell'] right now.
The chair's original paint is still visible 'in patches'. [=in spots]
The doctor 'patched' him 'up', so he's going to be as good as new.
(..) you got me standing here. Waiting on you now. Let's go. Come on. Wheels up! Rock and roll! - What you reading, platypus? - Nothing. Come on, sour patch. Don't be mad. I told you, I'm not mad. I'm indifferent, okay? - I said I was sorry. - Good morning, Mr. Stark. You don't need to apologize to me. (..)2008 Iron Man