Pros and Cons of grinding/polishing combustion chambers smooth?

Cudafever said
Just my opinion but i don't think I would mirror polish the combustion chamber and have proved that a mirror in the intake is a bad idea.
A mirror combustion chamber may be a good idea for detonation problem, but don't see any other advantage. Texture keep the air/fuel mixed in the port..............why wouldn't it do the same in the combustion chamber. I wouldn't polish up the combustion chamber any smoother than 80 grit on a cast iron head. here is a picture on top of a piston, that still make me go, Hmmm, was this machined????? or a nos created piston. Ask the owner of the piston but never got an answer. it was posted on facebook to show the crack on top to the piston.View attachment 1715122384
If that pIston was intentionally made that way, and i think it was..........why would you want a polished combustion chamber.!?

That image is the underside of a modified piston, maybe even a stock-type cast one at that. Why is anyone's guess, but weight reduction would be most likely, and it is way
too heavily relieved in a high heat/stress area. That has nothing to do with polished chamber surfaces. Breaking ALL sharp edges & polishing them some is std. op for Me on
just about anything I work on, that & getting rid of as many little "hidey pockets" that isolate the flame front, that is primarily what is needed to resist detonation. Polishing
the whole thing is for heat rejection and reduction in carbon which of course long term can help inhibit detonation as well.