Hobby Craft 1/35 Hummer MOTORIZED!

I finally picked up the Hobby Craft "Special Ops" Hummer at Hobby Lobby since they have a big sale going this week [1/3 off plastic models and another store had 1/2 off all plastic models]. Any ways i open up the box and what-do-ya-know a freaking DC motor falls out! It had an option to build it either motorized or not. It also incudes parts to build either a square canvas top version or the "slanted hard top". It also includes an M-60 and .50 cal machine guns to mount on the roof. I'm sure some of you guys already new of this kit but I'm a newbie to "armor" and now I'm addicted ever since i finished my first jeep last week and am currently working on a tamiya Bradley. I'm going to paint it solid olive drap like the one my dad had when he was stioned in germany. Any advice or painting tips [like the engine block, and interior] would be greatly appreciated!