Vray multi matte pass

Hey Guys 
I am new in Fusion so there is a lot WHAT WHY WTF atm .....
I got multi matte pass from vray and I would like to color correct the parts on my 3d object in Fusion separately.
Does anyone knows a good workflow for it?
Thanks.

I am new in Fusion so there is a lot WHAT WHY WTF atm .....
I got multi matte pass from vray and I would like to color correct the parts on my 3d object in Fusion separately.
Does anyone knows a good workflow for it?
Thanks.