They're pedals. You don't look at them, you ride on them. Every pair of clipless pedals I've ever had, from my Dura-Ace's (silver), to my first generation SPDs (black), to the current SPD's (black and silver) on my cyclocross bike have gotten hopelessly scraped and scuffed. And you know what?

They all still work beautifully. Now go get your pedals and ride. Chances are, you'll breeze by people so fast they won't even have a moment to glance at your pedals!!!

Yes, your cleats are alloy. Your pedals are alloy. Metal on Metal on metal, they'll take a licking and keep on ticking.