Modern Metalcraft?

So while browsing Gatherer today, I ran across a keyword that I hadn't heard from in a while; Metalcraft.

Seeing as how we're currently in a state of devotion based everything (at least in Standard. I now that Modern has been experimenting with it as well), I thought that going back to this 'devotion to artifacts' style mechanic would be a fun little challenge.

So right now, I'm in the midst of building a Modern Metalcraft deck. So far it's just white, and that would be for Ardent Recruit, Puresteel paladin, Dispatch, and Squadron Hawk (I've always been a fan of suiting up the hawks with some equipment and flying over everyone.

I'd like to know a couple of things to help me out with this little experiment:

-Has there ever been a competitive metalcraft deck? I started playing in Dark Ascension, and totally missed the boat on any scars block shenanigans.

-Is white the correct color to go with here? I thought of splashing red for galvanic blast, as well as bolt and helix, but i'm unsure on that front.

-What are some of the better artifacts in Modern that I could be taking advantage of? I've only started looking for things for this project, so obviously if there's something out of like, 10th that i'm missing, I won't find it for a while on my own.

Thanks for any help here!