very nice work man. definitely looks the part.. i would be VERY VERY careful with that spray cans. the propellant melts foam. so watch out for any exposed foam as it eats that stuff like you wouldn't believe. what you using in the power pack?
also you ever painted a camo pattern before?
if your using spray cans you can use masking take (i would advice getting some low tac stuff from hobbycraft or somewhere similar) or cut shapes (much less reliable) to shape your pattern, i think the flitetest guys tell you to sue masking tape you have abused a little to make it less sticky which should work too. ooooor you could use art masking fluid, although make sure you minwax the stuff before you paint it on. you need the strength or most of this stuff will kill the paper/card on the outside...
i think that's all i got for you on the painting before you get any of it done. i would advise getting an air gun and doing it by hand. but those thigns cost a bomb for just doing a few bits. personally i have an airbrush set up so i can totally cheat.