Gas grill flare up made flame covers look rusty I had a fairly intense flare up on my KitchenAid gas grill (too much canola oil) that lasted about 30 seconds. The inside of the grill is covered in soot (expected) but the flame covers (triangle shaped pieces above the flame) are now copper colored and look rusty. I got most of that off with cleaning, but it seems weird for a big flare up to have caused it.

Anyone else ever have that happen?

Thanks!
It is most likely rust. The covers over top of the burners will eventually experience that sort of decay. They have a constant barrage of high heat applied to them, which speeds oxidation of the metal. You will experience this effect with the burners as well.