Thank you everyone! And to answer Worktroll, I was inspired by the photo of the Shiro IWM uses on their online store. How it was done:
1) I prime all my minis with Krylon Covermaxx primers. Sticks great to metal or plastic (or just about anything else). Oh, just for info, I work at a locally owned True Value, so if I go off on a hardware tangent, that's why. In this case, I used gray.
2) Two thin coats of Vallejo Game Color (VGC) Goblin Green. That step went far better than I anticipated. Color and coverage were so nice, I didn't want to touch it at all with black wash.
3) VGC Chainmail Silver for all the silver trim on the armor. I didn't thin it at all, just went with a light touch.
4) VGC Gunmetal for the launchers. I also dry brushed it on the ammo feed for the AC.
5) VGC Bone White for the standards. Took three coats to get it where I wanted.
6) The Autocannon was done trying to follow Vallejo's guide for painting non-metallic metal. I still don't have for the knack for that. I seem to do better with dry bushing. Anyways, it was based with VGC Heavy Brown, washed with Vallejo Sepia ink, highlighted then with VGC Heavy Goldbrown, and finally touched up with VGC White with a little of the Goldbrown mixed in.
7) Sword is VGC Black and Metallic Gold.
8) Banding (or clips, whatever they are) on the standard are DecoArt Americana Metallics Rich Espresso.
9) Hex base was painted with VGC Dark Green. Grass is from Warlord Games. Brush is from Woodland Scenics.
I think that covers it. It was a solid week to finish it, and that was with dedicating some major time on my days off. Well worth it though :) I liked him so much, it inspired a whole lance. Thanks again everyone, and I would love to make the LA con, but sadly, I will be working that weekend :'( Give me a months notice for another one and I could make it happen.
