However you can have polished sharp edges, Seems to me polish is just more heat reflective, and that would likely be a small power boost, but only as long as it stayed reflective, wonder how long the dyno tests lasted that showed a boost.? What kinda of fuel, ie carbon/lead buildup? If coatings don't last why would polishing?

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.