How to denoise coat layer?

[maeyoshi]

Hi, I'm new to Arnold for Maya and have a simple question. 
How to denoise coat layer(both direct and indirect)? I don't see any sample that is related to coat in Render Settings > Arnold Renderer. 

[Stephen.Blair · Accepted solution]

coat is specular reflection, so I would look at specular samples

[maeyoshi]

Thank you! I will.