Thank you.
Remember, when you build think in sub-assemblies. Dont build it all and paint it as one piece, build the arm and paint the frame of the arm, then paint the armor separate and once there both dried and sealed then put the armor on. That is how I am building my Zaku.
Also, a BIG thing you need ot be careful for. Weathering. A Gundam is aprox 18.5 meters tall. That is a VERY big machine. a Person can stand next to the head and only come up 2/3rds of the height. So when your weathering, if you weather it like you would a tank or car, it will look WAY overdone.
use this guide, very good
http://codyscoop.com/ht-building.html