Yea, its weird for me as well. Om Dupes, this is the best place in the US to get gundam kits.
http://www.gundamstoreandmore.com/
they have the best prices, quite literally, and have a 110% price match guarantee. If you are going to go outside of the US HLJ.com would be your place.
Now dupes, dont think that just because the Gundam is white, blue, red, and yellow, in typical anime fashion, does not mean you can not weather it like you would armor. Honestly I would love to see you build both. I am always interested in seeing armor people's take on mechs.
Flat out, when building these think of them not as a 'giant anime mecha robot' but think about it what it was portrayed as In the series. The next new weapon, like jets before it, and tanks before that, and bi planes before that, and rifles before that, etc etc etc. If you treat them like something from anime, it will come out looking like... well an anime thing, bright shiny fancy colors, which can look good but compared to what we know armor modelers can do, it would be disapointing.
Also Dupes, remember this, its 1/144th in scale, remember the scale when weathering, if you weather spots to much it will make it look out of scale