Creating a bronze material for a monument sculpture

[_S_E_R_J_]

hey, everyone!
I have some troubles in creating a bronze shader for a monumetn sculpture. And I need something like on the reference below.
First I was trying with corona AO, but it didn't worked as I need to. So pls guys, do you have any ideas or suggestions what the shader should be - layered MTL or something else?

[CiroC]

You need some layered materials (depends of the complexity) and you can use AO and some bitmaps as masks. Look at the reference and see how many different elements you have. From there you can start creating your material and adding detail. I did something similar for another project