My go-to rifle is a highly polished Stainless Ruger M77 Mk II. On top of the shine from the steel, the stock finish has been worn to a warm glow from handling, as well. The whole weapon acts like a signal mirror. ...But the Antelope, Deer, and Elk don't seem to care.
The only firearm I've ever seen spook big game, was a Browning 1885 High Wall with a 28" octagonal barrel. The high polish on the barrel flats causes a strobe effect, as the rifle moves around on the hunter's shoulder, and reflects the sun. It is easily seen from more than a mile away, and definitely draws attention to the hunter, far too early in his stalks. ...But those high-polish flats on the octagonal barrel are the only time I've ever seen a firearm get some one 'busted'.