hunter green and hunt club green are totally different. i know you can find the hunt club green at home depot, probably at lowes as well. for my own armor i used majik new cat yellow, but i'm pretty sure that there is a rustoleum "equipment yellow" that would work well, you should be able to find that at home depot or ace hardware. i've used a couple different silvers, but with spraypaint silver it doesn't have a real high shine (which is good), just make sure what you're working on has all the prep done (i.e. a couple times over it with the sandpaper, i'd suggest starting with 400 then 800 then put the primer down then go over that with 1000. it should give you a real nice finish with the silver).
when it comes time to dirty it up, i'd suggest the krylon ultra flat black. to me it looks more like grime than paint, especially if you mist it on while the green is still wet. just don't go crazy with it, and don't go for even coverage with it either.
hope that helps you a little bit.