Giannis vs Polinik on the color of bronze :)

[tiberius aemilius naso]

Dan, I know that colors can be really altered by numerous factors concerning camera/lightning/screen... My question was more oriented to the reflective quality of the surface of the second helmet. It's like a mirror and the other isn't. Both are replicas, and i was just wondering if someone knew the difference between these two, being both of bronze (leaving apart color, alloy and so), how manufacturers get these two different results. This thread is probably not the right place for this question!