318 head porting for the average joe

Jadaharabi said
My head question for today.

Is it beneficial to smooth or polish up the combustion chamber?
I have seen some that the chamber is so polished they almost look like Chrome.

Or would it be more beneficial to use some of those new coatings on the combustion chamber?

I have a set of heads that have been ceramic coated in the CNC ports and the combustion chambers. Also he laid down a head gasket and did the surface around the chambers. Kim